A ProxyItemSelect is an abstract generalization of instances that are either ExternalItems or ExternalOwlObjects. A LocalizedString is a text based string. The language in which the the string is expressed is optionally identified. A DataContainer is an abstract generalization of the root element of a data file. Only non-abstract specializations of the DataContainer can be instantiated. A PlcsDataContainer is a specialization of the abstract DataContainer element. An Activity is the identification of the occurrence of an action that has taken place, is taking place, or is expected to take place in the future. The procedure executed during an Activity is identified by the ActivityMethod that is referred to by the chosenMethod attribute. Change, distilling, design, a process to drill a hole, and a task such as training someone, are examples of activities. NOTE: Status information identifying the level of completion of each activity may be provided within an instance of StateObserved. NOTE: The items that are affected by an Activity, for example as input or output, may be identified within an instance of ActivityAssignment. a set of Identifiers for the Activity. a set of text based descriptions of the Activity. A reference to a class held externally to the exchange file that classifies this Activity. This Activity is a member of the referenced class. A reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. A reference to the ActivityMethod used for this Activity. An ActivityActual is a specialization of Activity. It is a record of the occurrence of an Activity. The ActivityActual is related through an ActivityHappening to the Activity of which it is an occurrence. The existence of an ActivityActual instance means that the ActivityActual has commenced. NOTE: A DateTimeAssignment classified as "start date" should assign a date to the ActivityActual to record when the activity started. NOTE: A date and time may be assigned to the activity with role "end date" to record when the activity finished. In general, the absence of this assignment cannot be used to infer that the activity is continuing, only that the end of the activity has not yet been recorded. NOTE: A more detailed history of the progress of an activity may be recorded by applying states to the activity, but the meaning of these states must be defined through local business rules. An ActivityAssignment is a specialization of an AssignmentObject that represents the assignment of Activity instances to instances that are specializations of ActivityAssignmentSelect. NOTE: The meaning of the assignment is determined by classification which is identified by the AssignmentObject property. The possible classifications are subclasses of . NOTE: This entity should not be used to represent the association of an activity with the organizations that are responsible for its execution or its management. That kind of information can be represented with instances of OrganizationOrPersonInOrganizationAssignment the Activity that is considered. An ActivityHappening is a specialization of ActivityRelationship. It is a relationship between the definition of an activity (ActivityHappening) and its actual occurrence (ActivityHappening). NOTE: Many ActivityActuals may be realizations of a single Activity. A single defined check (e.g. an oil-check) is actually performed on many occasions or vehicles. NOTE: A single ActivityActual may realize several activities. A single actual servicing activity includes several checks and repairs (e.g. an oil-check and a tyre-replacement). An ActivityMethod is a way to carry out an Activity. NOTE: There may be more than one method for producing a required result. NOTE: This definition may be used to characterize a way to resolve a request for action. The concept of action request is represented by WorkRequest. a set of Identifiers for the ActivityMethod a set of text based descriptions of the ActivityMethod. a reference to a class held externally to the exchange file that classifies this ActivityMethod. This ActivityMethod is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the text that describes the results of application of this method. An ActivityMethodAssignment is an association of an ActivityMethod with product or activity data. the ActivityMethod that is to be associated with product or activity data. An ActivityMethodRealization is a specialization of an AssociationObject.  It is a further specification of how an activity method is to be performed with the ActivityMethod. NOTE: More than one specification can be associated with the same ActivityMethod. For a given planned activity there may be a task specification, a statement of how task performance is to be logged and a schedule that all apply. a set of Identifiers for the ActivityMethodRealization the ActivityMethod for which further specification is being provided. the item that realizes the ActivityMethod. A plan, schedule, or task description may realize the activity method. NOTE: More than one such item can be associated with the activity. An ActivityMethodRealizationRelationship is a specialization of an RelationshipObject that is a relationship between two instances of ActivityMethodRealization. NOTE: The meaning of the relationship is determined by classification which is identified by the ActivityMethodRealizationRelationship property. The possible classifications are subclasses of . NOTE: An ActivityMethodRealizationRelationship may be used to specify sequencing and other constraints between different realizations for the same ActivityMethod. a set of Identifiers for the ActivityMethodRealizationRelationship the other instance of ActivityMethodRealization that is a part of the relationship. If one ActivityMethodRealization in the relationship is dependent upon the other, this attribute shall be the dependent one. An ActivityMethodRelationship is a specialization of an RelationshipObject that is a relationship between two instances of ActivityMethod. NOTE: The meaning of the relationship is determined by classification which is identified by the RelationshipObject property. The possible classifications are subclasses of . a set of Identifiers for the ActivityMethodRelationship the other instance of ActivityMethod that is part of the relationship. NOTE: The related usually identifies the ActivityMethod, which is based on the definition of the relatingMethod. An ActivityRelationship is a specialization of an RelationshipObject that is a relationship between two instances of Activity. NOTE: The meaning of the relationship is determined by classification which is identified by the RelationshipObject property. The possible classifications are subclasses of . The activity required to complete a work order, may be decomposed into a series of activities. Their corresponding instances would be related using instances of the ActivityRelationship entity. a set of Identifiers for the ActivityRelationship the second instance of Activity that is part of the relationship. NOTE: The related usually identifies the Activity, which is based on the definition of the relatingActivity. NOTE: The meaning of this attribute is defined by the name attribute. An Address is the information that locate persons or organizations. It provides location details for communication via postal mail, telephone, facsimile, telex or electronic mail. a set of Identifiers for the Address a reference to a class held externally to the exchange file that classifies this Address. This Address is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the words by which the Address is known. It specifies the name of the location identified by the address. The value of this attribute need not be specified. "White House", "Buckingham Palace", and "North Pole" are examples of address name. the number of a location on a street. The value of this attribute need not be specified. the name of a street. The value of this attribute need not be specified. the number of a postal box. The value of this attribute need not be specified. the name of a town. The value of this attribute need not be specified. the name of a region. The value of this attribute need not be specified. the code that is used by the country's postal service. The value of this attribute need not be specified. the name of a country. The value of this attribute need not be specified. an organization-defined address for internal mail delivery. The value of this attribute need not be specified. the number to which facsimiles may be sent. The value of this attribute need not be specified. the number at which telephone calls may be received. The value of this attribute need not be specified. the electronic address to which electronic mail may be sent. The value of this attribute need not be specified. the number where telex messages may be received. The value of this attribute need not be specified. the text that specifies the Uniform Resource Locator associated with the address. The value of this attribute need not be specified. An AddressAssignment is a specialization of an AssignmentObject that represents the association of an Organization or a PersonInOrganization with an Address. NOTE: The meaning of the assignment is determined by classification which is identified by the AssignmentObject property. The possible classifications are subclasses of . the Address that is provided. An AddressBasedLocationRepresentation is a specialization of LocationRepresentation specified by its postal identification. the location where mail can be received. An AdvisoryNote is the link between a task element with an advisory task step. the AdvisoryTaskStep used to provide the details of the note. the TaskElement within which the note applies. An AdvisoryTaskStep is a type of TaskStep. It conveys information. NOTE: Some TaskMethods may not require any action to be undertaken. "Beware of hot exhausts", "do not use tool X this way" and similar messages. An AlternatePartRelationship is a specialization of AlternateProductRelationship where the alternate and base products are parts. An AlternateProductRelationship is an association between two instances of Product. It specifies that any version of the AlternateProductRelationship, may be used in place of any version of the baseProduct. The relationship established by the AlternateProductRelationship is not symmetric: if B is an alternate product for A, A is not implied to be an alternate product for B. NOTE: If a product is an alternate for another product, it is understood that there is no interest to keep track of which product, the base or any alternates specified, is used as a particular instance of the base product within a product structure. NOTE: An organization may track design changes for a base part, and establish effectivity conditions for the use of that base part in various assemblies to be manufactured. The use of an alternate product implies that an organization does not specify any particular version of the alternate product nor establish effectivities relating to it. NOTE: An AlternateProductRelationship may relate products of any kind, provided both related instances of Product identify products of the same kind, for example part-part or document-document. NOTE: An AlternateProductRelationship for which the baseProduct is an assembly involves that the entire product structure of the alternateProduct may be used in place of the baseProduct and its product structure. Two bolts of the same size are products. One bolt has a square head and the other has a hexagonal head. The two bolts are considered equivalent with respect to form, fit, and function: they both have sufficiently close physical shape, they take up the same space when used, and they both serve to fasten two things together. Thus, one of these two bolts could be considered to be an alternate part for the other bolt. a text description that specifies the rationale and criteria used to assess the capability of replacing the AlternateProductRelationship by the AlternateProductRelationship. The concept of alternate products usually refers to form, fit, function, and quality. Additional properties such as performance, noise, endurance, or reliability may also be considered as a prerequisite for the replacement. An Analysis is a specialization of Product. It is produced via a reproducible process. NOTE: Analysis is the process of studying or examining something in an organized way to learn more about it, or a particular study or examination of something. The full range of the analysis process includes mathematical, physical testing, cognitive, chemical, etc. An AnalysisAssignment is a specialization of a AssignmentObject that relates a specific version of an analysis to the item being analyzed. the AnalysisVersion being assigned. An AnalysisDisciplineDefinition is a specialization of ProductViewDefinition. It is a definition or view of an AnalysisVersion taken from the perspective of the analysing organization. The AnalysisDisciplineDefinition is controlled by the analysing organization. The entity may be used to capture the definition of a particular version of an analysis at any intermediate stage of its development where the definition is not formally released by an organization at the analysis version level. It may be used to capture the various stages in the definition cycle of a product. If the analysis is explicitly represented by a model then the model is referenced from AnalysisDisciplineDefinition.definitionalRepresentations. An AnalysisModel is used to support the description of analysis concepts. The data that makes up the analysis model. An AnalysisModelObject represents the results of an analysis. a set of Identifiers for the AnalysisModelObject a set of text based descriptions of the AnalysisModelObject. a reference to a class held externally to the exchange file that classifies this AnalysisModelObject. This AnalysisModelObject is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the AnalysisRepresentationContext in which the AnalysisModel is defined. An AnalysisRepresentationContext defines the context for the items (AnalysisModelItemsSelect) used in an AnalysisModel. a set of text based descriptions of the AnalysisRepresentationContext. a reference to a class held externally to the exchange file that classifies this Product This Product is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. An AnalysisVersion is a specialization of ProductVersion that identifies a particular version of an analysis. A AnalysisVersionRelationship is a specialization of ProductVersionRelationship that is used to assert an association between two versions of an analysis. A AnalysisVersionSequence is a specialization of AnalysisVersionRelationship that is used to assert that the one analysis version (the successor) replaces another (its predecessor). An AndStateCauseEffectDefinition is a specialization of StateCauseEffectDefinition. It relates one or more causing StateDefinition entities and one effect StateDefinition. All the causing StateDefinition entities must exist prior to the single effect. An ApplicationDomain defines the scope of applicability for a ViewDefinitionContext Each ApplicationDomain optionally references a data item in either a ExternalOwlObject or a ExternalItem that may indicate what the domain is. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file that provides the definition of the ApplicationDomain. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which the ApplicationDomain is a proxy. An Approval is a formal confirmation of the quality of some activity or product data. a set of Identifiers for the Approval a set of text based descriptions of the Approval. a reference to a class held externally to the exchange file that classifies this Approval This Approval is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the point in time when the Approval is or was supposed to be performed. The value of this attribute need not be specified. the point in time when the Approval actually became valid. The value of this attribute need not be specified. An ApprovalAssignment is the assignment of an Approval to activity or product data. the Approval that is assigned with activity or product data. An ApprovalRelationship is a typed association between two instances of Approval. the other instance of Approval that is a part of the relationship. If one element of the relationship is dependent of the other, this attribute shall be the dependent one. An ApprovingPersonOrganization is an association between an Approval and the organization or person and organization that has granted this approval. a reference to a class held externally to the exchange file that classifies this ApprovingPersonOrganization This ApprovingPersonOrganization is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the Organization, PersonInOrganization, Position or the PositionGroup that has granted the approval. the point in time when the Approval has been given. The value of this attribute need not be specified. the Approval that has been given by the considered person or the organization. An AssemblyViewRelationship is a specialization of ViewDefinitionRelationship. It identifies a possibly quantified usage of a product version as a component of another product version. The relationship is established between two ProductViewDefinitions The inherited attribute ViewDefinitionRelationship identifies the ProductViewDefinition of the assembly. The inherited attribute ViewDefinitionRelationship identifies the ProductViewDefinition of the product version that plays the role of component. The AssemblyViewRelationship specifies that, in the ProductViewDefinition of the ProductViewDefinition that is referred to as ViewDefinitionRelationship, it is considered that the product version that is indirectly identified with the ViewDefinitionRelationship attribute, is a component of the product version that is indirectly identified with the ViewDefinitionRelationship attribute. NOTE: In another context, the structure of the assembly may be described differently, adding, for example, an intermediate level between the products. NOTE: This entity data type may be used to establish assembly relationships during design or to represent the composition of an assembly existing in the real world. the Identifier that identifies this usage of the component in the assembly in a diagram, list, chart, or on a physical piece of equipment. The value of this attribute need not be specified. the ValueWithUnit that defines the amount of this usage of the component in the assembly. The value of this attribute need not be specified. An AssemblyRelationshipSubstitution is a relationship that indicates that an AssemblyViewRelationship may be substituted by another AssemblyViewRelationship. Both assembly relationships shall refer to the same ProductViewDefinition of the same assembly. NOTE: Consequently, an AssemblyRelationshipSubstitution actually specifies that the product version that plays the role of component in the substituteRelationship may be replaced by the product version that plays the role of component in the baseRelationship. NOTE: The instance of the substitute constituent does not require the same spatial relationship or the same quantity. A substitute constituent does not require equivalent form, fit, and function of the constituent for which it is a substitute. NOTE: As instances of AssemblyViewRelationship establish assembly relationships relevant in the definition contexts of the assembly, the substitution only apply in these contexts. An AssemblyRelationshipSubstitution defines a one-way substitution: if A is specified as a substitute for B, B is not implied to be a substitute for A. the AssemblyViewRelationship that may be used in place of the baseRelationship An AssignmentObject defines the allocation of one datatype to another. Only non-abstract specializations of the AssignmentObject datatype can be instantiated. a set of Identifiers for the AssignmentObject a set of text based descriptions of the AssignmentObject. a reference to a class held externally to the exchange file that classifies this AssignmentObject This AssignmentObject is a member of the referenced class. An AssignmentObjectRelationship is an association between two AssignmentObjects. NOTE: An AssignmentObjectRelationship can be used to represent a historical sequence of assignments. the second instance of AssignmentObject that is a part of the relationship. NOTE: If one AssignmentObject in the relationship is dependent upon the other, this attribute shall be the dependent one. An AssociationObject is an abstract generalization of instances that represent an association between two sets of product or activity data. A set of text based descriptions of the object. a reference to a class held externally to the exchange file that classifies this AssociationObject. This AssociationObject is a member of the referenced class. An Assumption is the identification of something assumed to be true without proof. The reason or justification for an assumption being made shall be represented by a JustificationAssignment being assigned to the Assumption. An activity is planned based on the assumption that the resource required to perform the activity is available at a location. The item that is assumed shall be related to the Assumption by an ItemAssumed a set of Identifiers for the Assumption a set of text based descriptions of the Assumption. a reference to a class held externally to the exchange file that classifies this Assumption This Assumption is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. An AssumptionAssignment is an association between an Assumption and the context in which the assumption is made. The following set of assumptions are relevant to the project. the Assumption that is assigned to activity or product data. An AssumptionRelationship is an association between two Assumptions. a set of Identifiers for the AssumptionRelationship the second instance of AssumptionRelationship that is a part of the relationship. NOTE: If one AssumptionRelationship in the relationship is dependent upon the other, this attribute shall be the dependent one. An AttachmentSlot is a specialization of Product that represents the position in which a part is or can be attached to a parent product. A fast jet aircraft has two engines. These engines are removable and interchangeable between individual aircraft. An attachment slot represents each installation position for an engine so as to ensure that an accurate record is maintained of which engines fly in which pairing on which aircraft for how many hours. An AttachmentSlotAsPlanned is a specialization of AttachmentSlotVersion that identifies an individual that is the subject of a plan to realize an AttachmentSlot. FlyFasterWithUs Group will buy an aircraft with serial number 1234 next year. The company wishes to plan the schedule for removal of engines from the aircraft for maintenance purposes. Instances of the AttachmentSlotAsPlanned entity data type allow the company to associate individual engines with the aircraft at different times over the planned period. An AttachmentSlotAsRealized is a specialization of AttachmentSlotVersion that identifies an individual that is a realized AttachmentSlot. FlyFasterWithUs Group operates an aircraft with serial number 1234 next year. The company records which individual engines power the aircraft at different times during the lifetime of the aircraft. An AttachmentSlotDefinition is a specialization of ProductViewDefinition that identifies a view of an AttachmentSlot. An airworthiness authority requires an airline company to report which individual engines power the aircraft at different times during the lifetime of the aircraft. An AttachmentSlotDesign is a specialization of AttachmentSlotVersion that identifies the design version of an attachment slot. WeMakeBigPlanes Limited creates design version 1.34 of the attachment slot for the starboard engine of an aircraft. An AttachmentSlotDesignToPlanned is a relationship between a design version of an AttachmentSlot and a planned individual that conforms to the design. WeMakeBigPlanes Limited plans production of aircraft serial number 1234 with a starboard engine attachment slot that is to conform to design version 1.34. the version of the attachment slot concept to which the planned individual will conform. the attachment slot that is to conform to the design version. An AttachmentSlotDesignToRealized is a relationship between a design version of an AttachmentSlot and a realized individual that conforms to the design. WeMakeBigPlanes Limited builds aircraft serial number 1234 with a starboard engine attachment slot that conforms to design version 1.34. the version of the concept to which the realized individual conforms. the individual that conforms to the design. An AttachmentSlotOnProduct is a relationship between a product and an AttachmentSlot that is a location on the product at which to install removable parts. An aircraft has a pylon mounting on a wing as a location at which to install various equipment. An instance of the AttachmentSlotOnProduct entity data type identifies which attachment slot corresponds to the pylon. a set of Identifiers for the AttachmentSlotOnProduct a set of text based descriptions of the AttachmentSlotOnProduct. a reference to a class held externally to the exchange file that classifies this AttachmentSlotOnProduct This AttachmentSlotOnProduct is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the thing that associates the attachment slot location at which to attach parts to the product view definition. a location on a product at which to attach parts via an aperture. An AttachmentSlotPlannedToRealized is a relationship between a realized individual of an AttachmentSlot and a corresponding planned individual. WeMakeBigPlanes Limited builds aircraft serial number 2468 with a starboard engine attachment slot that was previously planned. the attachment slot that relates to the realized individual. the individual that relates to the planned individual. An AttachmentSlotVersion is a specialization of ProductVersion that identifies a version of AttachmentSlot. NOTE: This is a generic concept of version, in most situations it is possible and more specific to represent a version as AttachmentSlotDesign, AttachmentSlotAsPlanned or AttachmentSlotAsRealized. An AxisPlacement is a specialization of DetailedGeometricModelElement that defines a right-handed, 2D or 3D, coordinate system. If the AxisPlacement belongs to a 3D geometric space, the third direction of the coordinate system is defined by the vector product of x-axis and y-axis. An AxisPlacement may be an AxisPlacement2d or an AxisPlacement3d. the CartesianPoint that defines the position of the AxisPlacement in the geometric space. the Direction that defines the first axis of the AxisPlacement. the Direction that defines the second axis of the AxisPlacement. An AxisPlacement2d is a specialization of AxisPlacement. An AxisPlacement3d is a specialization of AxisPlacement. An AxisPlacementMapping is a geometric transformation defined by a source AxisPlacement and a target AxisPlacement that results from the transformation of the source one. Both instances of AxisPlacement shall have the same dimensionality. The transformation shall be computed as the isometric transformation that maps: the origin of the source onto the origin of the target; the AxisPlacement of the source onto the AxisPlacement of the target; the AxisPlacement of the source onto the AxisPlacement of the target. NOTE: By construction, the determinant of the transformation matrix equals one. the AxisPlacement that plays the role of source in the transformation. the AxisPlacement that plays the role of target in the transformation. A Breakdown is a specialization of Product that identifies a partitioning of a product into a set of related elements so as to form explicit, parent-child views that comprise the product elements. The parent-child view is represented by BreakdownElementUsage instances relating the elements in the breakdown that are represented by BreakdownElement instances. A BreakdownContext is a membership relationship between a BreakdownElement and a Breakdown of which the element is a member. a set of text based descriptions of the BreakdownContext. a reference to a class held externally to the exchange file that classifies this BreakdownContext This BreakdownContext is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the version of the Breakdown of which the BreakdownElement is a member. the view of the version of the BreakdownElement that is a member of the Breakdown. A BreakdownElement is a specialization of Product that identifies the elements in one or more Breakdown instances. NOTE: BreakdownElement is non-specific and allows for various types of product breakdown. The more specific breakdown elements are FunctionalElement, PhysicalElement, SystemElement, and ZoneElement. A BreakdownElementDefinition is a specialization of ProductViewDefinition that identifies a view of a version ( BreakdownElementVersion) of a BreakdownElement. NOTE: BreakdownElementDefinition is non-specific and allows for various types of product breakdowns. The more specific breakdown element definitions are FunctionalElementDefinition, PhysicalElementDefinition, SystemElementDefinition and ZoneElementDefinition. A BreakdownElementRealization is a specialization of ProductDefinitionElementRelationship that identifies a relationship between a BreakdownElementDefinition or a BreakdownElementUsage and an item that realizes that element definition or usage. A pump realizes the 'provide fuel to engine' element in a functional breakdown for a ship. a set of Identifiers for the BreakdownElementRealization A BreakdownElementUsage is a specialization of ViewDefinitionRelationship that identifies a relationship between a parent and child BreakdownElement. A BreakdownElementVersion is a specialization of ProductVersion that identifies a version of a BreakdownElement. NOTE: BreakdownElementVersion is non-specific and allows for various types of product breakdown. The more specific breakdown elements are FunctionalElementVersion, PhysicalElementVersion, SystemElementVersion and ZoneElementVersion. A BreakdownOf is a relationship between a Breakdown and a Product of which the breakdown is a view. a set of text based descriptions of the BreakdownOf. a reference to a class held externally to the exchange file that classifies this BreakdownOf This BreakdownOf is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the ProductViewDefinition of which the breakdown is a view. A BreakdownVersion is a specialization of ProductVersion that identifies a version of a Breakdown the Breakdown_version shall be a breakdown of one and only one product. A CartesianPoint is a specialization of DetailedGeometricModelElement that defines a point by a list of up to 3 cartesian coordinates. A CartesianTransformation2d is a specialization of DetailedGeometricModelElement. It is defined in a 2D geometric space by a 2*2 matrix and a cartesian point. Let be: M, the 2*2 multiplication matrix of the cartesian transformation; A, the point of the cartesian transformation; P, a point in the geometric space; Q, the result of the application of the transformation to P. The coordinates of Q shall be obtained by the formula: Q = M*P + A the array of two instances of Direction that defines the multiplication matrix of the transformation. the CartesianPoint that defines the position of the result of the application of the transformation to the origin of the geometric space. A CartesianTransformation3d is a specialization of DetailedGeometricModelElement that is a geometric transformation defined in a 3D geometric space by a 3*3 matrix and a cartesian point. Let be: M, the 3*3 multiplication matrix of the cartesian transformation; A, the point of the cartesian transformation; P, a point in the geometric space; Q, the result of the application of the transformation to P. The coordinates of Q shall be obtained by the formula: Q = M*P + A the array of three instances of Direction that defines the multiplication matrix of the transformation. the CartesianPoint that defines the position of the result of the application of the transformation to the origin of the geometric space. A CausalConsequence is a specialization of ViewDefinitionRelationship that identifies secondary effects related to or resulting from a particular RiskConsequence. NOTE: A CausalConsequence is considered as an aftereffect of an immediate CausalConsequence. A Certification is a certificate. It asserts satisfaction of particular quality criteria. NOTE: Certification information can be attached to any aspect of product or activity data. a set of Identifiers for the Certification a set of text based descriptions of the Certification. a reference to a class held externally to the exchange file that classifies this Certification This Certification is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. A CertificationAssignment is an association of a Certification with activity or product data. 'certified supplier' is an example of certification that may be granted to an organization by its contractor. the Certification that is assigned to activity or product data. A ChainBasedGeometricItemSpecificUsage is a specialization of GeometricItemSpecificUsage that represents a chain of GeometricModels in a graph of GeometricModels, where the undirected links in the graph can be GeometricCoordinateSpaces, GeometricModelRelationships, or GeometricPlacementOperations. the list of items that relate nodes in the chain. A Classification is a relationship to the class that a subject is a member of. NOTE: The subject is represented by a Block that has a "classifiedAs" as a property of type Classification. A ClassificationRelationship is a specialization of an RelationshipObject that is a relationship between two instances of Classification. NOTE: The meaning of the relationship is determined by classification which is identified by the RelationshipObject property. The possible classifications are subclasses of . the other instance of Classification that is part of the relationship. If one element of the relationship is dependent upon the other, this attribute shall be the dependent one. An Collection is a specialization of Product that identifies a set of data. An CollectionAssignment is an association of an CollectionViewDefinition with the instance to which the collection has relevance. the CollectionViewDefinition that is assigned to activity or product data. An CollectionMembership is an association of an CollectionViewDefinition with an instance that represents a member of the collection. an instance that represents a member of the collection. the CollectionViewDefinition of which the instance is a member. An CollectionRelationship is a specialization of ProductRelationship that represents an association between two Collection instances. An CollectionVersion is a specialization of ProductVersion that represents a revision of an Collection. An CollectionVersionRelationship is a specialization of ProductVersionRelationship that represents an association between two CollectionVersion instances. An CollectionVersionSequenceRelationship is a specialization of CollectionVersionRelationship that represents a sequential association between two CollectionVersion instances. An CollectionViewDefinition is a specialization of ProductViewDefinition that represents a characterization of an CollectionVersion relevant in one or more application domains and for one or more life cycle stages. A set of data relevant to the design of the SS Titanic and a set of data relevant to the as-built description of the SS Titanic might be represented as two instances of CollectionViewDefinition. A ComponentUpperLevelIdentification is a specialization of AssemblyViewRelationship. It identifies a component of an assembly with respect to an upper level in the assembly structure. NOTE: A ComponentUpperLevelIdentification does not add a component in an assembly, it provides a means to further characterize a component with respect to an upper level assembly. A ComponentUpperLevelIdentification may be used to assign a property to a component that applies in the context of a particular upper level assembly. The identified component is the version of product, indirectly referred to as the ViewDefinitionRelationship of the subAssemblyRelationship. The upper level assembly is the version of product, indirectly referred to as the ViewDefinitionRelationship of the upperAssemblyRelationship. the NextAssemblyViewUsage that identifies indirectly the component that is further characterized by the ComponentUpperLevelIdentification. A CompositionOfState is a specialization of state relationship and it relates the nature of states in relation to one another, where two or more State parts compose a whole State; and furthermore, whole states can become parts of yet another whole State. A CompositionOfStateDefinition is a specialization of StateDefinitionRelationship. It relates StateDefinition entities to one another, when two or more StateDefinition entities act as parts to compose a whole StateDefinition; and furthermore, whole StateDefinition entities can become parts of yet another whole StateDefinition. A ConcurrentElements is a specialization of StructuredTaskElement that comprises a set of actions to be performed during the time required for the longest task. No specific order is required. the TaskElements to be performed. A Condition is a definition of the precedent that must be fulfilled before a statement or relationship becomes valid. NOTE: The condition is defined as a text based expression that is represented by the description attribute. The parameters against which the condition is to be evaluated are identified by ConditionParameter. The target or consequence of a condition is represented by ConditionAssignment. "If the engine has been running for 10000 hours then it requires a service" is an example of a conditional statement. The conditional part of the statement is "If the engine has been running for 10000 hours" which is stored in definition attribute on Condition. The parameter or subject of the condition is "the engine" which is represented by a ConditionParameter identifying the ProductAsRealized which represents the engine. The consequence of the condition is "then it requires a service". This is represented by ConditionAssignment identifying the task to perform the service, a TaskMethod. a set of Identifiers for the Condition a set of text based descriptions of the Condition. a reference to a class held externally to the exchange file that classifies this Condition This Condition is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the ConditionParameters that represent the parameters against which the condition is to be evaluated. A ConditionalEffectivity is a specialization of Effectivity for which the domain of applicability is defined by an explicit condition. the Condition that defines the domain of applicability. A ConditionAssignment is a relationship that identifies the statement or relationship to which a Condition applies. Condition 29 applies to the relationship between a Saab 9.3 car and the activity of checking the oil level on that make of car. the Condition that is being assigned. A ConditionEvaluation is a record of the evaluation of a Condition and the subsequent result. A Condition is "If the measured value of oil pressure from gauge 3 on a car is less than 2 bar then check the oil level" When the condition is evaluated it is recorded by an instance of ConditionEvaluation. The measured value of oil pressure from gauge 3 on car with VIN 12345678 is 1.9 bar. Therefore the result of the evaluated the condition is true. a set of Identifiers for the ConditionEvaluation a set of text based descriptions of the ConditionEvaluation. a reference to a class held externally to the exchange file that classifies this ConditionEvaluation This ConditionEvaluation is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the indication whether the Condition evaluates to True, False or Unknown. the Condition that has been evaluated. the ConditionEvaluationParameters that represent the parameters against which the condition has been evaluated. A ConditionEvaluationAssignment is a relationship that identifies the statement or relationship to which the ConditionEvaluation applies. The ConditionEvaluation (instance 87) is assigned to the activity of checking the oil level on car VIN 12345678. the ConditionEvaluation that is being assigned. A ConditionEvaluationParameter is an identification of the product or activity data used in the evaluation of the Condition identified by the ConditionEvaluation. The measured value of oil pressure from gauge 3 on car with VIN 12345678 (value = 1.9 bar). NOTE: The product or activity data is defined in ConditionEvaluationParameterSelect. a set of text based descriptions of the ConditionEvaluationParameter. a set of text based descriptions of the ConditionParameter. a reference to a class held externally to the exchange file that classifies this ConditionEvaluationParameter This ConditionEvaluationParameter is a member of the referenced class.a reference to a class held externally to the exchange file that classifies this ConditionParameter This ConditionParameter is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the product or activity data which acted as a parameter to the ConditionEvaluation. A ConditionParameter is a representation of the product or activity data that is used to specify a Condition. Oil pressure on gauge 3. NOTE: The product or activity data is defined in ConditionParameterSelect. a set of text based descriptions of the ConditionParameter. a reference to a class held externally to the exchange file that classifies this ConditionParameter This ConditionParameter is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the product or activity data which acts as a parameter to the condition. The value of this attribute need not be specified. A ConditionRelationship is a relation between two conditions. the other instance of Condition that is part of the relationship. If one element of the relationship is dependent upon the other, this attribute shall be the dependent one. A ContextualItemShape is a specialization of ItemShape that identifies the shape of a product version in the context of its use in another product version. The product version whose contextual shape is identified, is the product version associated with the ViewDefinitionRelationship of the ViewDefinitionUsage. Flexible part may have several shapes, each associated with a particular occurrence of the part in assemblies. the ViewDefinitionRelationship that identifies the using product version and the used product version. the ProductViewDefinition that identifies the definition of the product version whose shape is considered. A ContextualShapeRepresentation is a relationship that relates a ContextualItemShape and a GeometricModelRelationship. specifies a role of the ContextualItemShape for the ContextualShapeRepresentation. specifies a role of the GeometricModelRelationship for the ContextualShapeRepresentation. A Contract is a binding agreement. a set of Identifiers for the Contract a set of text based descriptions of the Contract. a reference to a class held externally to the exchange file that classifies this Contract This Contract is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. A ContractAssignment is an association of a Contract with activity or product data. the Contract that is to be associated with activity or product data. A ContractRelationship is a relationship between two Contract instances. the other instance of Contract that is a part of the relationship. If one Contract in the relationship is dependent upon the other, this attribute shall be the dependent one. A DatedEffectivity is a specialization of Effectivity for which the domain of applicability is defined as an interval of time bounded by dates or events. The interval may be open-ended. Events may be used to bound a DatedEffectivity period, at planning phase. Depending on which of the DatedEffectivity and DatedEffectivity attributes are specified, the actual domain of time defined by a DatedEffectivity is: the time interval between the start and end date or event; the open time interval that starts at the start date or event; the open time interval that ends at the end date or event (i.e. the start is unknown). If the DatedEffectivity is an event that actually identifies a point in time that comes before the DatedEffectivity, then the actual domain of effectivity is empty. A DateTimeAssignment is a specialization of an AssignmentObject that represents the assignment of a date and time, DateTimeString with activity or product data. NOTE: The meaning of the assignment is determined by classification which is identified by the AssignmentObject property. The possible classifications are subclasses of . the date and time that is assigned to activity or product data. A DecisionPoint is a type of StructuredTaskElement. It requires a decision that determines which further TaskElement is to be followed. NOTE: The condition on which the decision is based optionally allows a further TaskElement to be invoked to provide the basis for the decision. the criterion to be tested in order to make a decision. the TaskElement to be performed if the test condition is satisfied. The value of this attribute need not be specified. the TaskElement to be performed if the test condition is not satisfied. The value of this attribute need not be specified. the TaskElement to be performed if the test condition can not be evaluated or returns unknown. The value of this attribute need not be specified. A DecreasingResourceEvent is a specialization of ResourceEvent that decreases the balance of a managed resource. Filling a requisition reduces an inventory. A DefinedStateRelationship is a relationship that links a StateAssertion to a StateAssessment. a set of Identifiers for the DefinedStateRelationship the StateAssertion being related to the defined subject State from StateAssessment. A Descriptor is a set of words that describe something. The same thing may have multiple descriptions associated with it. Relating both a short description and a long description to an operational activity or an organization, as required by the US DoD Architecture Framework, are examples of multiple descriptions applied to the same item. a set of Identifiers for the Descriptor a reference to a class held externally to the exchange file that classifies this Description This Description is a member of the referenced class. the context in which the Descriptor has been made. A DescriptorRelationship is a relationship between a pair of Descriptors the other instance of Descriptor that is part of the relationship. If one element of the relationship is dependent upon the other, this attribute shall be the dependent one. A DetailedGeometricModelElement identifies a geometric construct. Only non abstract specializations of the DetailedGeometricModelElement entity data type can be instantiated. a reference to a class held externally to the exchange file that classifies this DetailedGeometricModelElement This DetailedGeometricModelElement is a member of the referenced class. A DigitalDocumentDefinition is a specialization of DocumentDefinition. It identifies a collection of files that are archived on an optical computer disc, magnetic, electronic storage, or a combination thereof. A digital document definition may consist of one or many component digital files. A DigitalFile is a specialization of File. A DigitalFile contains computer interpretable data and is stored on an electronic device. A DirectedActivity is a specialization of Activity. It identifies an activity that is governed by a WorkOrder. the WorkOrder that governs the DirectedActivity. A Direction is a specialization of DetailedGeometricModelElement that defines a 2 or 3 dimensional vector. NOTE: A Direction is not located in a geometric space but is used in the definition of geometric entities like AxisPlacement. A DistributionByValue is a specialization of ProbabilityDistribution that explicitly lists pairs of random variable values and function values. NOTE: DistributionByValue is used where there is no named distribution which can be used to identify the distribution, for example, when the distribution is derived from observation. a list of pairs consisting of a random variable value and the corresponding function value. This represents a numerical approximation to a probability distribution. NOTE: the value of random variable increases strictly monotonically along the list. The distribution is the probability generating function for an unfair dice ((1,0.1), (2,0.166),...,(6,0.23)). Here each pair represents the value on the face and the probability of it occurring. The probability of rolling a 1 or a 2 is therefore (0.1 + 0.166). The distribution is a cumulative distribution function for the measured length of a component ((2.1, 0.0), (2.2, 0.1), (2.3, 0.6), (2.4, 1.0)) Here each pair represents a length and the probability that the component exceeds that length. The probability that the component is between 2.2m and 2.3m long is therefore 0.5 (0.6 - 0.1). the type of function which the (random variable, function value) pair list represents. NOTE: Probabilities may be described by a number of different types of functions, such as the cumulative distribution function, the probability density function for continuous distributions or the probability generation function for discrete distributions. Each function is identified through reference-data. A Document is a specialization of Product used to identify documentation data that is under configuration change management. A DocumentAssignment is a mechanism to associate a document with product data, where the assigned document provides information about the data with which it is associated. the Document, DocumentVersion, DigitalDocumentDefinition or File that is used to provide information. A DocumentDefinition is a specialization of ProductViewDefinition that is a DocumentVersion in a particular format. NOTE: A DocumentVersion may have more than one representation. A version of a logical document, which contains a shape model, may be represented in the native formats of different CAD systems. Each DocumentDefinition is a DigitalDocumentDefinition or a PhysicalDocumentDefinition. NOTE: Aspects of the representation may not be known at the time the identification is established. A DocumentDefinitionRelationship is a relationship between two instances of DocumentDefinition. a set of Identifiers for the DocumentDefinitionRelationship the other instance of DocumentDefinition that participates in the relationship. If one element of the relationship is dependent upon the other, this attribute shall be the dependent one. A DocumentVersion is a specialization of ProductVersion A DocumentVersion identifies a particular version of a document. An Effectivity is the identification of a domain of applicability. NOTE: Instances of Effectivity may be applied to any kind of product or activity data. a set of Identifiers for the Effectivity a set of text based descriptions of the Effectivity. a reference to a class held externally to the exchange file that classifies this Effectivity This Effectivity is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. An EffectivityAssignment is the association of an Effectivity with product or activity data. the instance of the Effectivity entity that is assigned. An EffectivityRelationship is an association between two instances of Effectivity. The meaning of the relationship is represented with the relationType attribute. the second instance of EffectivityRelationship that is a part of the relationship. NOTE: If one EffectivityRelationship in the relationship is dependent upon the other, this attribute shall be the dependent one. An ElementConstraint is a specialization of TaskElementRelationship that signifies a constraint between TaskElements. The constraint may only apply within the context of a TaskMethod or TaskElement, specified as the context. the TaskElement within which the constraint applies. The value of this attribute need not be specified. Within a specific method, use of test equipment must be preceded by calibration. Or a 30 minute wait is required between stages of a method. An EndTask is a type of TaskElement. It signifies a point at which to end the task. An Envelope is an historical record of the transmission of a Message. It is used to record the audit data for sending and acknowledging a Message. Because it is an historical record, each Envelope is only used once, and so is not versioned. a set of Identifiers for the Envelope a reference to a class held externally to the exchange file that classifies this Envelope This Envelope is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the request for and acknowledgement of receipt of the Envelope. The value of this attribute need not be specified. On transmission of a Message this attribute shall take one of the values "" (blank), "ask message arrival" or "ask message read". A blank value expects no reply. A value of "ask message arrival" asks if the Message arrived at the recipients' mailbox, and requires the reply Envelope to have values "acknowledge arrival" if the Message arrives at the destination, or "delivery failure" if failure of the delivery is detected. NOTE: Envelope is used to provide an audit trail. There is no assumption that the transmission system has any knowledge of Envelope or its usage. However, if it reports some failure, this can then be recorded in the way described. A value of "ask message read" asks if the recipient has actually opened the Message to read it, and expects the reply "acknowledge read" on success, or "contents corrupt" if it is not possible to for it to be read. NOTE: For any single Envelope, there should be an acknowledgement per recipient. The acknowledgement will not contain a Message. NOTE: The Envelope being acknowledged is referenced using an EnvelopeRelationship. the Message that the Envelope is wrapping. A Message should be present unless the Envelope is being used to carry an acknowledgement. The value of this attribute need not be specified. An EnvelopeRelationship is an association of one Envelope with another. NOTE: The most obvious use of the association is to link an Envelope to its acknowledgements. the other instance of the Envelope participating in the relationship. If one Envelope participating in the relationship is dependent upon the other, this attribute shall be the dependent one. A EnvironmentAssignment is an assignment of a product to the environment in which it operates or is supported. the EnvironmentDefinitionView in which the product is supported or operates. An EnvironmentDefinition is a specialization of Product that is used to identify the definition of typical environment in which a product is to be, has been or is planned to be deployed in, operated in, or supported in. A EnvironmentDefinitionVersion is a specialization of ProductVersion that identifies a particular version of an EnvironmentDefinition. A EnvironmentDefinitionView is a specialization of ProductViewDefinition that provides a view of a version of an environment definition relevant for one or more application domains. This view collects the characteristics that define an environment. NOTE: The characteristics include the resources available, the locations in which the product is to operate as well as climatic conditions such temperature ranges. A EnvironmentViewDefinitionRelationship is a specialization of ViewDefinitionRelationship that represents an association between two EnvironmentDefinitionView instances. An Evidence is a collector of items used together to provide a single piece of evidence within a validation or verification. For example a document and its approval by a customer may be used together to provide evidence of customer acceptance. a set of Identifiers for the Evidence a set of text based descriptions of the Evidence. a reference to a class held externally to the exchange file that classifies this Evidence This Evidence is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. identifies the validation or verification for which this evidence has been related. the component data items used to support this evidence. A ExchangeContextClassLibrary is a representation of a universal resource identifier for the OWL reference-data library that provides the context for an exchange of data. NOTE: Each data exchange takes place in the context of a single OWL class library that references any other OWL libraries that are required. the URI by which the ExchangeContextClassLibrary is referenced and identified. An ExitLoop is a type of StructuredTaskElement. It signifies a point at which to exit from a loop. An ExpandedUncertainty is a specialization of StandardUncertainty that specifies the factor of an uncertainty. the multiplier of the uncertainty of the value. An ExperienceGained is a relationship between an ExperienceInstance and a person or organization. a reference to a class held externally to the exchange file that classifies this ExperienceGained This ExperienceGained is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the ExperienceInstance undergone by a person or organization. the person or organization that undergoes the ExperienceInstance. An ExperienceInstance is a particular episode of contact with and/or observation of facts or events which contributes to the accumulation of knowledge or skill. Changing the exhaust system on a car. 2 years work on same type of milling machine. 100 flying hours in a Tornado jet. 5 years as Workshop Manager. The nature, duration and worth of the ExperienceInstance can be described using assigned properties or by referring to activities or tasks. a set of Identifiers for the ExperienceInstance a set of text based descriptions of the ExperienceInstance. a reference to a class held externally to the exchange file that classifies this ExperienceInstance This ExperienceInstance is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. an experience instance contributes to the definition of the experience gained. the Activity or ResourceAsRealized that provides the content of the ExperienceInstance. The value of the attribute need not be specified. An ExperienceType is a category or class of experience. welding mechanical design flying a set of Identifiers for the ExperienceType a set of text based descriptions of the ExperienceType. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the ActivityMethod or RequiredResource that provides the content of the ExperienceType. The value of the attribute need not be specified. An ExperienceTypeRelationship is used to relate a compound experience to its component experiences. Ten years programming experience made up of five years C++ programming experience and five years Java programming experience. the ExperienceType that the ExperienceTypeRelationship identifies as a component of another ExperienceType. An ExternalAnalysisModel is a specialization of AnalysisModel whose content is provided in an external file. the DigitalFile that contains the analysis representation. The external file may be an analysis representation defined using AP209 in Physical File Format, or a tool specific format. An ExternalClass defines a relationship between a datatype and an non-OWL reference-data class of which instances of the datatype are members. a set of text based descriptions of the ExternalClass. the identification of the ExternalClass. the document that provides the definition for the ExternalClass. An ExternalGeometricModel is a specialization of 3D GeometricModel whose content is provided in an external file. The set of items of the ExternalGeometricModel contains only one element that shall be an AxisPlacement. This AxisPlacement specifies the reference location and orientation with respect to which placement of the ExternalGeometricModel in other GeometricModels shall be defined. the DigitalFile that contains the external geometry information. An ExternalItem is the representation of a reference to an object or item that is external to the data exchange file. The location of a digital file in a file system. A section in a document. A definition. a set of text based descriptions of the ExternalItem. the identification of the ExternalItem. the document within which the ExternalItem is defined. An ExternalOwlClass defines a relationship between a datatype and an OWL reference-data class of which instances of the datatype are members. The OWL class is defined and managed in an ontology external to the data exchange file. the Uniform Resource Identifier (normally an http:// URL) that specifies the OWL reference-data class of which referenced instances are members. An ExternalOwlObject states that a block instance is the same as an OWL reference-data item. NOTE: This capability is similar in nature to the ProxyObject built-in property in the World Wide Web Consortium Web Ontology Language, available from their Web site. ProxyObject indicates that two individuals or classes have the same 'identity'. the Uniform Resource Identifier (normally an http:// URL) that provides the identification and location of the OWL file and the relevant reference-data item within it. An ExternalPropertyDefinition is a reference to a property definition that is defined externally to the exchange file. A Property definition is the definition of a particular quality or feature of a product or activity data. A Property definition may reflect physics or arbitrary user defined measurements. Colour is a property of product and is defined by a red, green and blue values. a reference to a class held externally to the exchange file that classifies this ExternalPropertyDefinition. This ExternalPropertyDefinition is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which the ExternalPropertyDefinition is a proxy. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file that provides the definition of the ExternalPropertyDefinition. An ExternalTypeQualifier is a reference to the specification of the type of a datum that is defined externally to the exchange file. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which the ExternalTypeQualifier is a proxy. An ExternalUnit is a unit quantity. a reference to a class held externally to the exchange file that classifies this ExternalUnit This ExternalUnit is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file that provides the definition of the ExternalUnit. A File is a file stored on a computer system or in a stack of non-digital documents. a set of Identifiers for the File a set of version identifiers for the File. a string that provides information about the kind of data stored in the file. The value of this attribute need not be specified. Where applicable, the following values shall be used: 'geometry': The file contains a shape model; 'NC data': The file contains numerical control data; 'FE data': The file contains finite element data; 'sample data': The file represents measured data; 'process plan': The document file represents process planning data; 'check plan': The document file represents quality control planning data; 'drawing': The document file represents a technical drawing. a reference to a class held externally to the exchange file that classifies this File This File is a member of the referenced class. a set of text based descriptions of the File. A FileRelationship is a relationship between two instances of File. A service manual may contain graphics for explanatory reasons. In this case, the File instances that contain the graphics are referenced as related from the File instance that contains the body of the service manual with DocumentDefinitionRelationship 'reference'. the other instance of File that participates in the relationship. If one element of the relationship is dependent upon the other, this attribute shall be the dependent one. A FunctionalBreakdown is a specialization of Breakdown that identifies a partitioning of a product into a set of related functional elements so as to form explicit structural views that comprise the product elements. The composite - component view is represented by FunctionalElementUsage instances relating the functional elements in the breakdown which are represented by FunctionalElements. A functional breakdown provides a decomposition of an aircraft in terms of high-level functional processes such as flight, taxiing and at rest all the way down to low-level processes such as detect on-board fuel level, move tail rudder and provide standard tow attachment point. A FunctionalBreakdownContext is a specialization of BreakdownContext that is an association of a FunctionalElement to a FunctionalBreakdown of which the functional element is a member. A function 'provide load lifting capability' is member of the functional breakdown of a helicopter. A FunctionalBreakdownVersion is a specialization of BreakdownVersion that identifies a version of a FunctionalBreakdown A FunctionalElement is a specialization of BreakdownElement that identifies the elements in one or more FunctionalBreakdown instances. A FunctionalElementDefinition is a specialization of BreakdownElementDefinition that identifies a view of a version ( FunctionalElementVersion ) of a FunctionalElement A FunctionalElementUsage is a specialization of BreakdownElementUsage that is an association of a functional element to another functional element that is a constituent. FunctionalElement. A FunctionalElementVersion is a specialization of BreakdownElementVersion that identifies a version of a FunctionalElement A FunctionValuePair is a single random variable/value pair, thus defining a single point on the distribution curve of a numerically defined distribution. The distribution function for the tossing of two coins uses the number of heads as the random variable and the probability as value of the function, and has the form of a list of three pairs ((0, 0.25), (1, 0.5), (2, 0.25)) - 0, 1 and 2 being the random variable values, 0.25, 0.5 and 0.25 being the probability values. the value of the probability function for the given random variable value. the value of the random variable. A GeometricCompositionWithOperatorTransformation is a specialization of GeometricRelationshipWithOperatorTransformation. A GeometricCompositionWithPlacementTransformation is a specialization of GeometricRelationshipWithPlacementTransformation. A GeometricCoordinateSpace is a type of ChainedGeometricModelLinkSelect that defines a coordinate space where geometric elements can be defined. It is either two-dimensional or three-dimensional. There shall be at least two units specified for the GeometricCoordinateSpace: one length unit and one plane angle unit. The length unit applies to each coordinate direction. The length unit millimetre and the angle unit radian are examples of units that may assigned to a GeometricCoordinateSpace. NOTE: The origin for coordinate values is implicitly defined as being the cartesian point whose coordinates are all zero. the dimensionality of the geometric space. the uncertainty measures that apply. A GeometricItemSpecificUsage is an identification of a DetailedGeometricModelElement within a GeometricModel or an ExternalGeometricModel as being the element that describes a ShapeElement or ShapeElementRelationship of an ItemShape that is described by the GeometricModel or an ExternalGeometricModel. In an application protocol, an instance of GeometricModel describes the ItemShape of a product. One element of the GeometricModel - a curve - represents the boundary of a hole that is a ShapeElement in the product. This entity data type may be used to state that the curve describes the hole, in the context of the entire GeometricModel describing the shape of the product. a set of text based descriptions of the GeometricItemSpecificUsage. specifies the role of the ShapeElement that is being represented by the GeometricItemSpecificUsage for the GeometricItemSpecificUsage. specifies the role of the DetailedGeometricModelElement for the GeometricItemSpecificUsage. specifies the role of the GeometricModel that includes the GeometricItemSpecificUsage in it's set of items. The usedModel describes the ItemShape for the GeometricItemSpecificUsage. A GeometricModel is a model comprising geometric constructs. The GeometricModel is founded in a GeometricCoordinateSpace. The items of a GeometricModel are instances of DetailedGeometricModelElement. a set of Identifiers for the GeometricModel a set of version identifiers for the GeometricModel. the LengthMeasure that specifies the radius of a sphere that encloses all elements of the geometric model. The centre of the sphere is located at the origin of the GeometricCoordinateSpace of the GeometricModel. The value of this attribute need not be specified. the GeometricCoordinateSpace in which the GeometricModel is defined. the instances of DetailedGeometricModelElement that are included in the GeometricModel. A GeometricModelRelationship is a type of ChainedGeometricModelLinkSelect. one of the instances of GeometricModel that is a part of the relationship. the other instance of GeometricModel that is a part of the relationship. If one element of the relationship is the dependent upon the other, this attribute shall be the dependent one. A GeometricModelRelationshipWithTransformation is a specialization of GeometricModelRelationship. A GeometricModelRelationshipWithTransformation may be a GeometricRelationshipWithPlacementTransformation or a GeometricRelationshipWithOperatorTransformation A GeometricOperatorTransformation is a specialization of GeometricPlacementOperation. the CartesianTransformationSelect that identifies the target of the transformation. A GeometricPlacement is a specialization of GeometricPlacementOperation. the AxisPlacement that identifies the target of the placement. A GeometricPlacementModel is a specialization of GeometricModel. A GeometricPlacementOperation is a specialization of DetailedGeometricModelElement. A GeometricPlacementOperation may be a GeometricPlacement or a GeometricOperatorTransformation. the AxisPlacement that identifies the source of the operation. the value from GeometricModel. A GeometricRelationshipWithOperatorTransformation is a specialization of GeometricModelRelationshipWithTransformation. the CartesianTransformationSelect that identifies the transformation for the GeometricRelationshipWithOperatorTransformation. A GeometricRelationshipWithPlacementTransformation is a specialization of GeometricModelRelationshipWithTransformation. the AxisPlacementMapping that identifies the transformation for the GeometricRelationshipWithPlacementTransformation. A GlobalLocationRepresentation is a type of LocationRepresentation specified using geographic means in the global system and values, which could be physical or political geographic values. specifies the height above sea-level of the location. The value of the attribute need not be specified. specifies the geographical, physical or political region of the indicated location, such as Europe, North America, Berlin or Indian Ocean. The precise location can be further detailed within refinements. The value of the attribute need not be specified. the angular distance of a place north or south of the equator. the angular distance of a place east or west of the Greenwich meridian. A Hardcopy is a specialization of File that represents a non-digital document. An actual stack of paper consisting of one or more sheets, on which some product data is written, printed or plotted. A HierarchicalInterfaceConnection is a specialization of InterfaceConnection that provides an interconnection between components at different levels in an assembly. Each connection point in the assembly is represented by a InterfaceConnectorOccurrence. An appliance such as a television has a power lead and attached plug. The plug and power lead could be represented as an assembly of parts such as the plug pins and wires. Each connection point of the pins and wires in the assembly is represented by a InterfaceConnectorOccurrence and an instance of the HierarchicalInterfaceConnection entity data type identifies the connection of the pins (the parts) to the plug (the assembly) in the assembly. An Identifier provides the identifying name or code for the activity or product data. a reference to a class held externally to the exchange file that classifies this Identifier This Identifier is a member of the referenced class. A IdentifierRelationship is a relationship between a pair of Identifiers. NOTE: The meaning of the relationship is determined by classification which is identified by the RelationshipObject property. The possible classifications are subclasses of . ISO is an acronym for "International Standard Organization". When ISO and "International Standard Organization" are used as identifiers for the ISO organization, they may be related to indicate that ISO is the acronym for "International Standard Organization". the other instance of Identifier that is part of the relationship. If one element of the relationship is dependent upon the other, this attribute shall be the dependent one. A IncreasingResourceEvent is a type of ResourceEvent that increases the balance of a managed resource. Purchasing new stock increases an inventory. An InformationRight is a definition of what may or may not be done with information in the sense of legal rights and obligations. NOTE: This a general purpose definition of a right that may be applied to many things. The usage of the InformationRight is represented by InformationUsageRight. The application of that right to information is represented by InformationUsageRightAssignment. Copyright is an InformationRight. For the purposes of developing a new system, details of government furnished equipment may be made available to a particular project team. The team may copy and use the information internally, but may not pass it on, either to a third part, or to another team, and must destroy the information at the end of the contract. a set of Identifiers for the InformationRight a set of text based descriptions of the InformationRight. a reference to a class held externally to the exchange file that classifies this InformationRight This InformationRight is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the text that describes any conditions and limitations that apply to the exercise of the right. The value of this attribute need not be specified. The description of the right states that copying is permitted within the project team only, whereas the restriction notes the additional constraint that the information must be destroyed at the end of the project. An InformationUsageRight is an application an InformationRight to a particular usage context. NOTE: One view of the distinction between an InformationRight and an InformationUsageRight is that the InformationRight represents a standard clause in a contract, whereas an InformationUsageRight represents the fact that the clause is used in a particular contract. NOTE: The context for the usage can be defined through the contract which defines the right, the organization that grants the right, the person or organization which is granted the right, and any dates such as the starting or ending dates for the right. The meaning of each association is identified through the roles of the assignments, and these are defined through reference-data. NOTE: The Approval of an InformationUsageRight carries the meaning that the right is granted to all information items in the relevant context, as opposed to the approval of an InformationUsageRightAssignment which is limited to particular items. NOTE: InformationUsageRight provides a mechanism for recording significant rights within a product database. The legal significance of the presence or absence of a right is outside the scope of this part of ISO 10303 a set of Identifiers for the InformationUsageRight a set of text based descriptions of the InformationUsageRight. a reference to a class held externally to the exchange file that classifies this InformationUsageRight This InformationUsageRight is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the additional information to be recorded about the InformationUsageRight. The value of this attribute need not be specified. An InformationUsageRightAssignment is an application of a particular usage right to a set of items. NOTE: If an approval is applied to this entity, it carries the meaning that the particular set of items is approved for the given usage. This approval generally indicates that the approval is exceptional, for example, where the information belongs to another project, and that project agrees to share some particular items of information. There is a further implication that the set of entities should not be changed once the approval is given. the InformationUsageRight that is assigned to activity or product data. An InformationUsageRightRelationship is the relationship of one InformationUsageRight to another. Where one InformationUsageRight supercedes another, then the original right is pointed to by the relating attribute, its replacement by the related attribute, and the relationType attribute takes the value "supercedes". the other instance of InformationUsageRight that is a part of the relationship. If one InformationUsageRight participating in the relationship is dependent upon the other, this attribute shall be the dependent one. A InterfaceConnection is an interconnection between a connected pair of InterfaceConnectorOccurrences. Each InterfaceConnectorOccurrence represents the place where a product used in an assembly can interact with other products in the assembly. An appliance such as a television has a power lead and attached plug. The plug and power lead could be represented as an assembly of parts such as the plug pins and wires. Each connection point of the pins and wires in the assembly is represented by a InterfaceConnectorOccurrence and an instance of the InterfaceConnection entity data type identifies the connection of the pins to the wires in the assembly. a set of Identifiers for the InterfaceConnection a set of text based descriptions of the InterfaceConnection. a reference to a class held externally to the exchange file that classifies this InterfaceConnection This InterfaceConnection is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. one of the instances of the connected pair of InterfaceConnectorOccurrences. the other instance of the connected pair of InterfaceConnectorOccurrences. If one element of the relationship is dependent upon the other, this attribute shall be the dependent one. An InterfaceConnector is a specialization of Product that identifies a part of a product with which one or more other products or the environment interacts. NOTE: This is sometimes referred to as a "port". A computer has a socket to which to connect a network cable. An instance of the InterfaceConnector entity data type identifies the role of the socket in the interface and is the subject of a specification that defines the necessary geometrical and electrical attributes to ensure a functioning interface between the computer and network hardware. An InterfaceConnectorAsPlanned is a specialization of InterfaceConnectorVersion that identifies an individual that is the subject of a plan to realize an InterfaceConnector. Company Acme Limited is planning to produce an aircraft with serial number 1234 next month. This aircraft has connectors on each engine for fuel pipes. The company wishes to plan when each connector will be realized and then identify a date on which an inspector can test all the realized connectors. An InterfaceConnectorAsRealized is a specialization of InterfaceConnectorVersion that identifies an individual that is a realized InterfaceConnector. Company WeFlySafest Corporation owns and operates an aircraft with serial number 1234. When landing at Heathrow airport, the pilot reports a loss of fuel pressure on engine number 4 with serial number A9876 and recommends that an inspector tests the realized connector on the engine. An InterfaceConnectorDefinition is a specialization of ProductViewDefinition that identifies a view of an InterfaceConnectorVersion. A reliability engineer assesses the likely failure modes of design version 3.8 for the connector between a brake unit and the hydraulic control system. The engineer generates a set of data that is a specific view of the connector. An instance of the InterfaceConnectorDefinition entity data type collects these data together. the item for which the InterfaceConnectorDefinition provides an interface capability. An InterfaceConnectorDesign is a specialization of InterfaceConnectorVersion that identifies a design version of an InterfaceConnector. BuildAWidget Incorporated creates design version 2.10 for an electrical supply connector. An InterfaceConnectorDesignToPlanned is a relationship between a design version of an InterfaceConnector and a planned individual that is to conform to the design. BuildAWidget Incorporated plans production of pump serial number 30301 with an electrical supply connector that is to conform to design version 2.10. the version to which the planned individual will conform. the individual that is to conform to the design version. An InterfaceConnectorDesignToRealized is a relationship between a design version of an InterfaceConnector and a realized individual that conforms to the design. BuildAWidget Incorporated builds pump serial number 30301 with an electrical supply connector that conforms to design version 2.11. the version to which the realized individual conforms. the individual that conforms to the design. A InterfaceConnectorOccurrence is an occurrence of a InterfaceConnectorDefinition. The InterfaceConnectorOccurrence represents the place where a product used in an assembly can interact with other products in the assembly. The interaction is represented by a InterfaceConnection. a set of Identifiers for the InterfaceConnectorOccurrence a set of text based descriptions of the InterfaceConnectorOccurrence. a reference to a class held externally to the exchange file that classifies this InterfaceConnectorOccurrence This InterfaceConnectorOccurrence is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the InterfaceConnectorDefinition of which the InterfaceConnectorOccurrence is an occurrence of. the item for which the InterfaceConnectorOccurrence provides an interface capability. An InterfaceConnectorPlannedToRealized is a relationship between a realized individual of an InterfaceConnector and a corresponding planned individual. BuildAWidget Incorporated builds pump serial number 30302 with an electrical supply connector that was previously planned. the individual that relates to the realized individual. the individual that relates to the planned individual. An InterfaceConnectorVersion is a specialization of ProductVersion that identifies a version of an InterfaceConnector. A InterfaceDefinitionConnection is an interconnection between a connected pair of InterfaceConnectorDefinitions or, if the point of interconnection is not specified, the interconnection between a pair of views ( ProductViewDefinitions) on products A socket in the wall provides access to the domestic electricity supply. An appliance such as a television has a power lead and plug that fits into the socket. An instance of the InterfaceDefinitionConnection entity data type identifies this fitting of the plug into the socket. a set of Identifiers for the InterfaceDefinitionConnection a set of text based descriptions of the InterfaceDefinitionConnection. a reference to a class held externally to the exchange file that classifies this InterfaceDefinitionConnection This InterfaceDefinitionConnection is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. one of the instances of the connected pair of InterfaceConnectorDefinitions, or if the point of interconnection is not specified, the interconnection between a pair of ProductViewDefinitions. the other instance of the connected pair of InterfaceConnectorDefinitions or ProductViewDefinitions. If one element of the relationship is dependent upon the other, this attribute shall be the dependent one. An InterfaceDefinitionFor is a relationship between an InterfaceSpecification and an item that conforms to the specification. The infrared transmitter in a television remote control conforms to the specification that has the identifier 2345/XYZ/001. An instance of the InterfaceDefinitionFor entity data type is necessary to identify this relationship. the specification that defines necessary attributes for the item that participates in the interface. the item that conforms to the interface specification. An InterfaceSpecification is a specialization of Product that provides a definition of necessary attributes for one or more items that participate in an interface. BSI develops a standard for connecting domestic electrical equipment to the electricity supply. An InterfaceSpecificationDefinition is a specialization of ProductViewDefinition that provides a view of an InterfaceSpecification. When developing a BSI standard for connecting domestic electrical equipment to the electricity supply, collected comments from experts form a new view on a version of the standard. An InterfaceSpecificationVersion is a specialization of ProductVersion that identifies a version of an InterfaceSpecification. In 1999, BSI issues a new version of a standard for connecting domestic electrical equipment to the electricity supply. An InZone is a relationship between a ZoneElement and an item that exists within the zone. A pump is in the starboard engine room of a ship. the item that exists in the zone. the region in which the item exists. An ItemAssumed is an association between an Assumption and the item that is being assumed. A facility is assumed to exist at a given location. The facility shall be represented by a ResourceItemAssignment, the location by a Location, and the existence of the facility at the location, by a LocationAssignment assigning a location to the resource. a set of text based descriptions of the ItemAssumed. a reference to a class held externally to the exchange file that classifies this ItemAssumed This ItemAssumed is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the Assumption. the item that is assumed to be true. An ItemDesignAssociation is the association of a ProductConfiguration with a ProductViewDefinition or a ProductVersion. It specifies the design that corresponds to the ProductConfiguration. If the design is a ProductViewDefinition, the ItemDesignAssociation represents the statement that, in the considered definition context, the product version, that is, the ProductViewDefinition is a valid way to implement the ProductConfiguration. NOTE: This association might not be valid in all definition contexts of the product version. If the design is a ProductVersion, the ItemDesignAssociation represents the statement that, in all definition contexts, the ProductVersion is a valid way to implement the ProductConfiguration. NOTE: The association might not be valid for other versions of the product. the ProductConfiguration for which a product solution is designated. the ProductVersion or the ProductViewDefinition that identifies a product which is a valid implementation for the ProductConfiguration. AnItemShape is a specialization of an ItemShapeObject  that represents the shape of a ShapeableItemSelect. specifies the role of the ShapeableItemSelect whose shape is the ItemShape. AnItemShapeObject is an abstract generalization of instances that represents the shape of a ShapeableItemSelect. NOTE: Only non-abstract specializations of the ItemShapeObject can be instantiated. a set of Identifiers for the ItemShape a set of text based descriptions of the ItemShape. a reference to a class held externally to the exchange file that classifies this ItemShape This ItemShape is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. An ItemUsageEffectivity is an effectivity domain that constrains the use of a product with or within another product, in the context of a ProductConfiguration. The effectivityDomain attribute identifies a domain of effectivity. The itemUsageRelationship attribute identifies a relationship which characterizes the use of the product with or within another product. This relationship may be an assembly-component relationship or a make-from relationship. The resolvedConfiguration attribute identifies an association between a ProductConfiguration and a product that implements it. This attribute establishes the context in which the itemUsageRelationship is considered and constrained. When the effectivity domain is a range of serial numbers, the serial numbers considered are those of the ProductConfiguration. When the effectivity domain is defined using a production lot number, the production lot considered is one of the ProductConfiguration. When the effectivity domain is an interval of time, the interval of time considered is related to the production of the ProductConfiguration. NOTE: When no effectivity constraint is applied to a ViewDefinitionUsage, the validity or applicability status of this ViewDefinitionUsage is unknown. a reference to a class held externally to the exchange file that classifies this ItemUsageEffectivity This ItemUsageEffectivity is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the Effectivity that defines the domain of effectivity. the ViewDefinitionUsage whose applicability is constrained. the ItemDesignAssociation that identifies the context where the itemUsageRelationship is considered. A Justification is the identification and description of the reasons for something. Justification entities may be associated with the data to which they apply. A justification may be provided for a product design. Similarly, a justification may be provided for why an activity is needed or was undertaken. a set of Identifiers for the Justification a set of text based descriptions of the Justification. a reference to a class held externally to the exchange file that classifies this Justification This Justification is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the text that provides information about the nature of the context in which the Justification applies. The value of the attribute need not be specified. A JustificationAssignment is the association between a Justification and the item for which the Justification is provided. The item can be an activity or a product design. the Justification that is assigned to activity or product data. A JustificationRelationship is an association between two Justifications. a set of Identifiers for the JustificationRelationship the other instance of Justification that is part of the relationship. If one element of the relationship is dependent upon the other then this attribute shall be the dependent one. A JustificationSupportAssignment is the association between a Justification and the item providing evidential support for the Justification The support item can be the results from an analysis, a report, or professional judgment. the item which provides evidential support for a Justification. A LifeCycleStage represents a point, period, or step in a lifecycle. It is referenced by ViewDefinitionContext. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file that provides the definition of the LifeCycleStage. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. A Location is a place or position where an activity or event can occur or a product or resource can exist. a set of Identifiers for the Location a set of text based descriptions of the Location. a reference to a class held externally to the exchange file that classifies this Location This Location is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. A LocationAssignment is a relationship between a product, event, or person and a location. There may be distinct assignment for each qualification. for example planned, scheduled or actual. Each assignment may have a start and end date or time. A location may have multiple assignments. the Location that is assigned to activity or product data. A LocationRelationship is a relationship between two locations. Location B, which is in reference to location A or Location B (UK), which is a refinement of Location A (Europe). the other instance of Location that is a part of the relationship. If one element of the relationship is dependent upon the other then this attribute shall be the dependent one. A LocationRepresentation is a means of representing a location. a set of Identifiers for the LocationRepresentation a set of text based descriptions of the LocationRepresentation. a reference to a class held externally to the exchange file that classifies this LocationRepresentation This LocationRepresentation is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. A LoopingElement is a specialization of TaskElement. It invokes a specified number of repetitions of a further TaskElement. the TaskElement to be repeated in the looping element. A LotEffectivity is a specialization of Effectivity for which the domain of applicability is defined as a given batch of items. the identification of the batch of items. the size of the batch of items. A MakeFromRelationship is a specialization of ViewDefinitionUsage established between two instances of PartViewDefinition. It specifies that, in the context of the definition of the relating part version, the relating part version is considered as resulting from the manufacturing transformation of the related part version. NOTE: The related part version may identify a raw material or a semi-finished part. the ValueWithUnit that specifies the amount of the related part version that is used to produce the relating part version. The value of this attribute need not be specified. The quantity is specified when the related part version is a countable material. If the value is absent , it shall be considered that one occurrence of the related part version is used to produce the relating part version. an integer that ranks the preference for use of the related part version among all instances of MakeFromRelationship that have the same value for the inherited MakeFromRelationship attribute. This value is an integer that only has meaning when comparing it with corresponding values for MakeFromRelationship sharing the same MakeFromRelationship. It is a relative ranking value, not an absolute ranking. A lower value indicates a higher preference for the MakeFromRelationship, and a higher value indicates a lower preference. The value of this attribute need not be specified. A ManagedResource is a representation of a resource that is provided with resource management capabilities. The role of a managed resource is determined by classification. A managed resource can be classified as "Stock line". a set of Identifiers for the ManagedResource a set of text based descriptions of the ManagedResource. a reference to a class held externally to the exchange file that classifies this ManagedResource This ManagedResource is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the measure of the amount of the resource that is available at a given location. The value of this attribute need not be specified. a reference to an identifiable ResourceItem (within the application context) that (when realized) will satisfy that requirement. A ManagedResourceRelationship is an association between two managed resources. The meaning of the relationship is determined by classification. A managed resource relationship can be classified as "Alternative" or "Preferred". the other instance of ManagedResource that is a part of the relationship. If one element of the relationship is dependent upon the other, this attribute shall be the dependent one. A Market is the identification of a marketing segment for products. a set of Identifiers for the Market a set of text based descriptions of the Market. a reference to a class held externally to the exchange file that classifies this Market This Market is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the text that identifies a marketing category of products. 'Luxury automobiles', 'laptop personal computers', and 'budget personal stereos' are examples of market segment types. The value of this attribute need not be specified. A MeasureQualification is a means to provide information about measurements in which there is an associated uncertainty. The uncertainty may be specified as precision, qualitative uncertainty, or expanded uncertainty, and the type of the related datum shall be included. The uncertainty is defined in clause 2 of "The Guide to the Expression of Uncertainty in Measurement". a set of text based descriptions of the MeasureQualification. a reference to a class held externally to the exchange file that classifies this MeasureQualification This MeasureQualification is a member of the referenced class. specifies the ValueQualifierSelect for the MeasureQualification. There shall be one or more ValueQualifierSelect for each qualifiers. A Message is a collection of information, brought together by an originator (the message definer) for some particular purpose, generally the fulfillment of a process. A Message is an historical record, intended to be sent using an Envelope and in consequence, is not versioned. NOTE: The same Message can be sent several times using different Envelope. Once it has been sent once, it cannot be further changed. However it should not remain unsent, since that is to confuse its functions and therefore its meaning with other entities such as one of the types of document. a set of Identifiers for the Message a set of text based descriptions of the Message. a reference to a class held externally to the exchange file that classifies this Message This Message is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the actual contents of the Message or a reference to the contents. the identification of who ( Organization or PersonInOrganization) or what defined the message, that is, identified its purpose and contents. The value of this attribute need not be specified. the ExchangeContextClassLibrary that identifies the OWL class library used in the exchange. This OWL class library may reference any other OWL libraries that are required. A MessageRelationship is a link between two related messages. The meaning of the association depends on MessageRelationship.role. If Message=2 replaces Message=1, then MessageRelationship.related points to Message=2 and MessageRelationship.relating points to Message=1 with MessageRelationship.role="replaces". the other instance of Message participating in the relationship. If one Message participating in the relationship is dependent upon the other, this attribute shall be the dependent one. A NextAssemblyViewUsage is a specialization of AssemblyViewRelationship. It establishes a relationship between a component and its immediate parent assembly in a product structure. A NumericalContext is a context in which a NumericalValue is recorded. The context may represent the organization, technique or system used to establish the NumericalValue. a reference to a class held externally to the exchange file that classifies this NumericalContext. This NumericalContext is a member of the referenced class. a set of text based descriptions of the NumericalContext. the accuracy to which the NumericalValues in this context are measured. specifies the minimum number of decimal digits that ValueWithUnits in this NumericalContext are measured. If present, the numerical measure or range may be specified using more digits than the significant digits but shall not be specified using less digits. The value of this attribute need not be specified. A NumericalValue is a specialization of a ValueWithUnit representing a quantity expressed with a numerical value and a unit. the quantity of the NumericalValue. the context in which the NumericalValue is recorded. An Observation is an historical record of something that has occurred during the life of a product or its support environment. Its use is restricted to observations not directly represented in the data model, and should not be used where some other reporting data structure is defined. a set of Identifiers for the Observation a set of text based descriptions of the Observation. a reference to a class held externally to the exchange file that classifies this Observation This Observation is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the context in which the observation is made. A problem is found during a maintenance operation. The set of contexts can include the equipment being maintained, the end product the equipment is fitted to, the activity being undertaken, the manual that describes the activity and the resources being used. the person or equipment that did the observing. By default this is a piece of physical equipment, represented by ProductAsRealized. NOTE: One use of Observation is to provide a link between health monitoring equipment and the file it produces (recorded as a Document). the ActivityActual that was being performed when the observation was made. The value of this attribute need not be specified. An unexpected problem may be found during a maintenance activity, in which case the ActivityActual is the maintenance activity itself. Aircraft health monitoring data is collected during a flight. The flight profile may be recorded using the ActivityActual. NOTE: Some business rules may require that an observation is always made against an ActivityActual, while others may not require that the activity be recorded. An ObservationAssignment is an association of an Observation with any item that an observation can be made about, or any item that can be used as part of the observation. the Observation that applies to or is relevant to the assigned item. An ObservationConsequence is an association of an observation to the consequences that follow from it, where those consequences are in the form of a WorkRequest. NOTE: One of the uses of ObservationConsequence is to close one of the feedback loops from the use of a product to requests for its enhancements. a set of Identifiers for the ObservationConsequence the Observation that leads to the consequence. the WorkRequest that the consequence entails. An ObservationRelationship is a relationship between two observations. The nature of this relationship is identified by the role. Where there is a structural relationship between Observation, the semantics of the structure are identified by the classification of the ObservationRelationship against reference-data. The Observation of a persistent fault is composed of a series of Observation of occurrences of the same fault. That is, ObservationRelationship.related points to the composite Observation, while ObservationRelationship.relating points to one actual Observation of the occurrence. The ObservationRelationship.role of the relationship is "observed instance", while it is classified as "is composed of". In this example, the component Observation will apply to ProductAsRealized and the consequence will be to rectify the individual faults, while the composite Observation will apply to a ProductVersion and the consequence will be a design change. the other instance of Observation that is a part of the relationship. If one element of the relationship is dependent upon the other then this attribute shall be the dependent one. An ObservedEnvironment is a specialization of Product that represents a record of observations about the environment in which a product is or has been operating. An ObservedEnvironmentAssignment is an assignment of a product to the environment in which is or has operated. a record of the environment, ObservedEnvironmentView, in which the product is supported or operates. An ObservedEnvironmentToDefinition is a relationship between a record of a set of observations about an environment, represented by an ObservedEnvironment, and a typical environment, represented by an EnvironmentDefinition. The typical environment is the expected environment about which observations have been made. the typical environment about which the recorded observations have been made. the record of observations about an environment. An ObservedEnvironmentToDefinitionVersion is a relationship between a version of the record of a set of observations about an environment, represented by an ObservedEnvironmentVersion, and a version of the typical environment, represented by EnvironmentDefinitionVersion. The typical environment is the expected environment about which observations have been made. the version of the typical environment about which the recorded observations have been made. the version of the record of observations about an environment. An ObservedEnvironmentToDefinitionView is a relationship between a view of the record of a set of observations about an environment, represented by an ObservedEnvironmentView, and a view of the typical environment, represented by EnvironmentDefinitionView. The typical environment is the expected environment about which observations have been made. the view of the typical environment about which the recorded observations have been made. the view of the record of observations about an environment. An ObservedEnvironmentVersion is a specialization of ProductVersion that identifies a particular version of an ObservedEnvironment. An ObservedEnvironmentView is a specialization of ProductViewDefinition that provides a view of a version of an observed environment relevant for one or more application domains. This view collects the characteristics of the observations on the environment. An ObservedEnvironmentViewDefinitionRelationship is a specialization of ViewDefinitionRelationship that represents an association between two ObservedEnvironmentView instances. An Organization is an administrative structure in which persons are active. a set of Identifiers for the Organization a set of text based descriptions of the Organization. a reference to a class held externally to the exchange file that classifies this Organization This Organization is a member of the referenced class. An OrganizationalLocationIdentification is location that is defined by an identification which is specific in an organization context. a set of Identifiers for the OrganizationalLocationIdentification a set of text based descriptions of the OrganizationalLocationIdentification. a reference to a class held externally to the exchange file that classifies this OrganizationalLocationIdentification This OrganizationalLocationIdentification is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the text that characterizes the identification location. compartment or building. the value of organization based location identification. An OrganizationBasedLocationRepresentation is a specialization of LocationRepresentation that specifies a location in the context of an organization. The location "Room 99" in "The Administration Building" of a particular university might be represented using one instance of OrganizationBasedLocationRepresentation with two instances of OrganizationalLocationIdentification and one instance of Organization. the organization in which the location identifier is meaningful. An OrganizationOrganizationTypeRelationship is a relationship between an Organization organization and an OrganizationType. the OrganizationType. An OrganizationOrPersonInOrganizationAssignment is an association of an organization or a person in an organization with activity or product data. the organization or person in organization that is to be associated with the activity or product data. An OrganizationRelationship is a relationship between two instances of Organization. A team belongs to a department which itself belongs to a company. Such an organizational structure can be described up using instances of OrganizationRelationship. the other instance of Organization that is part of the relationship. If one element of the relationship is dependent upon the other, this attribute shall be the dependent one. An OrganizationType is a recognized kind of Organization. legal entity change control board sales organization manufacturing organization department a set of Identifiers for the OrganizationType a set of text based descriptions of the OrganizationType. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. An OrStateCauseEffectDefinition is a specialization of StateCauseEffectDefinition. It relates one or more StateDefinition entities that are causes to a StateDefinition that is the effect. At least one cause must exist prior to the effect. A ParameterizedDistribution is a specialization of ProbabilityDistribution that is used to link a named probability distribution to the parameters that define it. NOTE: The ParameterizedDistribution of this entity is used to discriminate between alternative parameterizations of the same distribution. NOTE: To calculate a value using a ParameterizedDistribution it is necessary to know the general distribution function, the value of the distribution function parameters, and the specific random variable value for which the probability evaluation is required. The Probability Distribution module does not define the formula for the distribution function, and it is assumed that this is defined externally, either through reference information or via a "formula" module. This entity provides the distribution function parameters. The value of the random variable for which the probability is calculated is provided by the ProbabilityDerivationParameter. the list of parameters used in the parameterization. NOTE: In many distributions there is a trivial relationship between the mean and variance for the distribution. In such a case it is not necessary to list the parameters. the name of the parameterization, distinguishing it from other parameterizations. A Part is a specialization of Product that collects the definitional information of the versions of either a part or of a non-countable material. NOTE: A Part does not represent an actual physical object that is or was existing in the real world. NOTE: A complex instance of the Part entity and of the Document entity may be created in order to represent a document that is a component of a manufactured product, for example a user manual of a car. A PartialDocumentAssignment is a specialization of DocumentAssignment. A PartialDocumentAssignment identifies a specific portion of the contents of a document. It assigns this portion to the product data for which it is relevant. the word or group of the words that convey the subject or sub contents of the Document. A PartVersion is a specialization of ProductVersion that identifies a version of a part. A PartVersion serves as the collector of the data characterizing a realizable object in various application contexts. NOTE: A PartVersion is expected to be functionally and physically interchangeable with the other versions of the same Part. A PartViewDefinition is a specialization of ProductViewDefinition that defines a characterization view of a version of a Part. A Person is an individual human being. a set of Identifiers for the Person a set of text based descriptions of the Person. a reference to a class held externally to the exchange file that classifies this Person This Person is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the Person's name. the first element of the Person's list of forenames. The value of this attribute need not be specified. the Person's other forenames. The value of this attribute need not be specified. the text that specifies the Person's social or professional standing and appear before his or her names. The value of this attribute need not be specified. "Mr.", "Ms", "Dr." and combinations are examples of prefixTitles. the text that specifies the Person's social or professional standing and appear after his or her names. The value of this attribute need not be specified. "Ph.D." and "Esquire" are examples of suffixTitles. A PersonInOrganization is the identification of a Person and of his role in an Organization a set of Identifiers for the PersonInOrganization a set of text based descriptions of the PersonInOrganization. a reference to a class held externally to the exchange file that classifies this PersonInOrganization. This PersonInOrganization is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the Person who is related with an Organization. the Organization to which a Person is related. A PersonOrOrganizationOrPersonInOrganizationInPosition is a Person, Organization, or PersonInOrganization that holds a Position. A person may hold more than one position within an organization or organizations. A person can hold two positions in an organization: Production Manager and Safety Officer. A position in an organization can be held by more than one person or organization. Two people can hold the same position in a job-share scheme. a set of Identifiers for the PersonOrOrganizationOrPersonInOrganizationInPosition a set of text based descriptions of the PersonOrOrganizationOrPersonInOrganizationInPosition. a reference to a class held externally to the exchange file that classifies this PersonOrOrganizationOrPersonInOrganizationInPosition This PersonOrOrganizationOrPersonInOrganizationInPosition is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the Person or Organization who holds the Position. the Position that is held by the Person or Organization. A PersonOrOrganizationOrPersonInOrganizationInPositionRelationship is a specialization of an RelationshipObject that is a relationship between one Organization, Person, or PersonInOrganization and another. Examples of the relationship are: successor job-share NOTE: The meaning of the relationship is determined by classification which is identified by the RelationshipObject property. The possible classifications are subclasses of . a set of Identifiers for the PersonOrOrganizationOrPersonInOrganizationInPositionRelationship the other instance of Organization, Person, or PersonInOrganization that participates in the relationship. If one element of the relationship is dependent upon the other, this attribute shall be the dependent one. A PhysicalBreakdown is a specialization of Breakdown that identifies a partitioning of a product into a set of related physical elements so as to form explicit, parent-child views that comprise the product elements. The parent-child view is represented by PhysicalElementUsage instances relating the physical elements in the breakdown which are represented by PhysicalElements. A physical breakdown might provide a decomposition of an automobile in terms such as body, roof, bonnet, bumpers and this breakdown might be different from, and orthogonal to, a parts decomposition. A PhysicalBreakdownContext is a specialization of BreakdownContext that is a membership relationship between a PhysicalElement and a PhysicalBreakdown of which the physical element is a member. A wheel is a member of the physical breakdown of an automobile. A PhysicalBreakdownVersion is a specialization of BreakdownVersion that identifies a version of a PhysicalBreakdown An engineer modifies the current physical breakdown for an aircraft on the basis of a tail re-design. A PhysicalDocumentDefinition is a specialization of DocumentDefinition. A physical document definition may consist of one or many component hardcopy files. Paper plots of technical drawings, micro fiche, or paper documents such as calculations or test reports are examples of PhysicalDocumentDefinition. A PhysicalElement is a specialization of BreakdownElement that identifies the elements in one or more PhysicalBreakdown instances. A PhysicalElementDefinition is a specialization of BreakdownElementDefinition that identifies a view of a version ( PhysicalElementVersion) of a PhysicalElement. A PhysicalElementUsage is a specialization of BreakdownElementUsage that is a relationship between a parent and child PhysicalElement. In a physical breakdown, the aircraft (parent) might include (as children) a fuselage, wings, tail and undercarriage. A PhysicalElementVersion is a specialization of BreakdownElementVersion that identifies a version of a PhysicalElement An engineer changes the details describing the undercarriage that is an element in a physical breakdown of an aircraft. A Position is a function or job performed by a person. It defines responsibilities and activities. A position that is not fulfilled by a person is a vacancy. Company Director Service Engineer a set of Identifiers for the Position a set of text based descriptions of the Position. a reference to a class held externally to the exchange file that classifies this Position This Position is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the Address of the position. The value of the attribute need not be specified. the organization, project or group that uses this position. A PositionAssignment is an association of a Position with activity or product data. the Position that is assigned to activity or product data. A PositionGroup is a group for collecting people in their positions to cooperate in an assignment. People representing utility companies who cooperate with each other to coordinate road works. a set of Identifiers for the PositionGroup a set of text based descriptions of the PositionGroup. a reference to a class held externally to the exchange file that classifies this PositionGroup This PositionGroup is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the Address of the PositionGroup. The value of the attribute need not be specified. the organization or project that uses this PositionGroup. A PositionGroupAssignment is an association of a PositionGroup with activity or product data. the PositionGroup that is assigned to activity or product data. A PositionGroupRelationship is a relationship that specifies the participation of a position in a group. the job or function that belongs to the group. A PositionPositionTypeAssignment is an assignment of PositionType to a Position. It allows many positions to be described by many position types. the PositionType which is assigned to a Position. A PositionRelationship is a specialization of an RelationshipObject that is a relationship between two instances of Position. Examples of relationships between Positions are: Superior / Subordinate Superceded by NOTE: The meaning of the relationship is determined by classification which is identified by the RelationshipObject property. The possible classifications are subclasses of . the other instance of Position that participates in the relationship. If one element of the relationship is dependent upon the other, this attribute shall be the dependent one. A PositionType is a recognized kind of position. Chief Executive Officer Manager Service engineer Programmer Aircraft engineering technician propulsion a set of Identifiers for the PositionType a set of text based descriptions of the PositionType. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the TypeOfPerson that serves as a defining example for the PositionType. A PositionTypeAssignment is the association of a PositionType with activity or product data. the PositionType that is assigned to activity or product data. A PrecisionQualifier is a specification of the number of significant digits in the representation of a value. PrecisionQualifier shall be interpreted in accordance with PrecisionQualifier in part 45 of this standard. NOTE: The precision is defined in clause 2 of "The Guide to the Expression of Uncertainty in Measurement". a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. specifies the number of significant digits of the value. A PreDefinedTypeQualifier is a type of TypeQualifierSelect whose PreDefinedTypeQualifier has predefined values: 'minimum': the value is a minimum value; 'maximum': the value is a maximum value; 'nominal': the value is a nominal value; 'specified': the value has been specified; 'typical': the value is typical; 'calculated': the value has been calculated; 'designed': the value represents a value intended by the design; 'estimated': the value has been estimated; 'measured': the value has been measured; 'required': the value represents a requirement; 'set point': the value is used as an initialization value; 'basic': the value is a basic value; 'lower deviation': the value is maximum deviation in the negative direction from the nominal or basic value; 'upper deviation': the value is maximum deviation in the positive direction from the nominal or basic value. the words by which the PreDefinedTypeQualifier is known. A Probability is a specialization of PropertyValue that is a probability value (see definition 3.5.1 above). A ProbabilityByName is a specialization of Probability whose value belongs to a one of a set of named classes, rather than by assigning a specific numerical value, which may not be available. A safety assessment methodology classes the probability an accident as "very unlikely", "unlikely", "significantly likely" and "almost certain". Any process that has a "very likely" or "almost certain" chance of causing serious injury is shut down. the named probability value A ProbabilityDerivationParameter is a specialization of NumericalValue that is used by a ProbabilityDerived in a particular role in order to calculate the particular probability. In a coin tossing trial, the probability calculated is that of getting more than 6 heads in ten tosses. The parameter with the role "minimum number of heads" will have the value "6" NOTE: The value attribute, which holds the parameter value, is inherited from the parent generalization. A ProbabilityDerived is a specialization of ProbabilityNumeric that associates a particular value of ProbabilityNumeric with the source from which the value derived together with any parameters used to get the particular value. NOTE: Where the probability derived from a probability distribution, the parameters of ProbabilityDerived are those needed to get a single value from the distribution, and not those which characterise the distribution. For example, in the case of coin tossing, the distribution is a Binomial distribution, with parameters of 'probability for a single toss', and 'number of tosses', whereas the parameter for the ProbabilityDerived will be the 'number of heads obtained'. the source from which the value derives. NOTE: The possible sources for values include a probability distribution, a statistic or a reference document. the list of parameters which are applied to a ProbabilityDistribution to get the actual ProbabilityByName A ProbabilityDistribution is a specialization of ProbabilityGenerator that is a probability distribution. NOTE: For a full understanding of probability distribution and the terms used, a textbook on probability theory should be consulted. NOTE: This entity describes a particular probability distribution, rather than the general type of distribution. For example, in coin tossing experiment, the number of heads that may occur is given by a binomial distribution - that is, a type of distribution, and outside the scope of this module. a set of Identifiers for the ProbabilityDistribution the name of the type of distribution. The value of the attribute need not be specified. NOTE: The name is taken from reference-data, which is based on the standard mathematical names for distributions, such as "Binomial", "Normal", "Gaussian". Empirically derived distributions will not normally be named. the text that distinguishes whether the domain of the probability distribution is discrete or continuous. The measurement of a person's height is a continuous distribution, since it can take any value between 0 and 3m. Coin tossing gives rise to a discrete distribution, since the number of heads cannot be a fraction. the expectation E(x), which is the "summation" of x.p(x) over all x, where x is the random variable, and p(x) is the probability of its occurrence. The term "summation" covers both literal summation in the case of a discrete distribution, and integration for a continuous distribution. the real number indicating the square of the standard deviation of the probability distribution. A ProbabilityDistributionParameter is a specialization of NumericalValue that is one of the set of values that characterises a probability distribution. The Normal (or Gaussian) distribution has, in the standard parameterisation, two parameters: the mean and the variance NOTE: For many common distributions, the mean and the variance are sufficient to characterize a distribution, and the parameter list may be empty. NOTE: ProbabilityDistributionParameter inherits the 'name' attribute from its parent generalization, and this is used to identify the name of the parameter within the particular parameterization. The value attribute is also inherited. A ProbabilityFunctionValue is a specialization of NumericalValue that is the value of the probability function at the given random variable value. NOTE: The value is an inherited attribute. It is not in general a probability value. In some functions for continuous distributions, the probability that the random variable lies between two values is the integral of the function of that range. A ProbabilityGenerator is a specialization of PropertyValue. It is a source from the ProbabilityDerived is derived. The ProbabilityDerivationParameters are applied to the ProbabilityGenerator to get the particular derived value. NOTE: A ProbabilityGenerator will generally be either a ProbabilityDistribution or a function of some statistics. A probability of "0.67" is derived from a Normal (or Gaussian) distribution using the parameter "plus or minus '1.0' standard deviations from the mean" A ProbabilityNamedValue is used to hold the name of the probability value. NOTE: The value attribute is the description inherited from the parent generalization. In general, this value will be one of an enumeration of possible values defined through reference-data. a text based descriptions of the Product. a reference to a class held externally to the exchange file that classifies this ProbabilityNamedValue This ProbabilityNamedValue is a member of the referenced class. the name of the probability value. A ProbabilityNumeric is a specialization of Probability that is expressed as a numeric value between 0 and 1. the value of the probability A ProbabilityNumericValue is a specialization of NumericalValue providing a numeric representation of a probability. NOTE: The value attribute is inherited from the parent generalization. A Product is the identification of a product or of a type of product. It is a collector of data common to all revisions of the Product. NOTE: Products that this entity data type can represent, include: products existing in the real world; products that may come into existence as a consequence of some realization process. This includes parts and documents; products that are functions. The SS Titanic is a product that could be represented by the entity data type Product. Lifeboat is a class of products that could be represented by the entity data type Product. Each lifeboat on the SS Titanic is a member of this class. NOTE: A product is identified by an organization or a person in an organization. NOTE: A product may have zero or more versions. A version of a product is represented with an instance of the entity ProductVersion or of one of its specializations. a set of Identifiers for the Product a set of text based descriptions of the Product. a reference to a class held externally to the exchange file that classifies this Product This Product is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the versions of the Product. A ProductAsIndividual is a specialization of Product that identifies an individual artefact that has been made or is planned to be made. It is a collector of data common to all revisions of the ProductAsIndividual. NOTE: Revisions ( ProductAsIndividualVersion) of ProductAsIndividual are used to represent whether an individual artefact has yet to be made or has been made. The ProductAsIndividualVersion specialization ProductAsPlanned is used to represent the revision of an individual artefact that has yet to be made and the specialization ProductAsRealized is used to represent the revision of an individual artefact that has been made. NOTE: Where physical products are being represented, the ProductAsIndividual represents the physical or planned physical realization of a product. NOTE: It is likely, but not essential, that the artefact, was or will be made from a product design. The product design will be represented by a Product which will be related to the ProductAsIndividual by ProductDesignToIndividual. NOTE: Many physical products may be produced from a given design. A single Product may lead to many ProductAsIndividuals. The design of a personal computer is represented by a Product. The personal computer with a serial number on a persons desk is represented by a ProductAsIndividual and an associated revision represented by ProductAsRealized. The personal computer that has been ordered, allocated a serial number for manufacturing planning, but not yet manufactured, is represented by a ProductAsIndividual and an associated revision represented by ProductAsPlanned. HMS Daring is the first of a new class of ships known as Type 45 Destroyers. It is due to enter service in two years time. The Type 45 ship design that applies to HMS Daring is represented by a Product; The ship HMS Daring is represented by a ProductAsIndividual. This identifies the planned ship, and when built, the actual ship; The planned revision of the future ship HMS Daring is represented by a ProductAsPlanned which is related back to the ProductAsIndividual; When built, the first revision the actual ship, HMS Daring will be represented by a ProductAsRealized which is related back to the ProductAsIndividual. A ProductAsIndividualEffectivity is a specialization of Effectivity for which the domain of applicability is defined as a set of instances of ProductAsIndividual. A ProductAsIndividualVersion is a specialization of ProductVersion. It is a revision of a ProductAsIndividual and acts as a collector of the definitions of this revision. The car on my drive is represented by a ProductAsIndividual. The current configuration status of the car can be represented by a ProductAsRealized related to the ProductAsIndividual. If a safety modification is made to the car resulting in a new configuration status of the car, then this may be represented by a new ProductAsRealized. HMS Daring is the first of a new class of ships known as Type 45 Destroyers. It is due to enter service in two years time. The version of the generic Type 45 ship design that applies to HMS Daring is represented by a ProductVersion; The ship HMS Daring is represented by a ProductAsIndividual. This identifies the planned ship, and when built, the actual ship; The planned revision of the future ship HMS Daring is represented by a ProductAsPlanned related back to the ProductAsIndividual; When built, the first revision the actual ship, HMS Daring will be represented by a ProductAsRealized related back to the ProductAsIndividual. A ProductAsIndividualView is a specialization of ProductViewDefinition that defines a characterization view of a version of a ProductAsIndividual. NOTE: The ProductAsIndividualView entity type supports the representation of different views of a ProductAsIndividual for different purposes. Multiple views of the same ProductAsIndividual are represented by different instances of ProductAsIndividualView for the same ProductAsIndividualVersion. A ProductAsPlanned is a specialization of ProductAsIndividualVersion that identifies a revision of an individual artefact that has yet to be made. NOTE: It may be planned to make the artefact from of a version of a product design ( ProductVersion). If this is the case, then the relationship between the artefact ( ProductAsPlanned) and the design ( ProductVersion) is represented by ProductDesignVersionToIndividual. NOTE: If the planned artefact ( ProductAsPlanned) is subsequently made into an actual artefact ( ProductAsRealized) then they are related by the ProductPlannedToRealized relationship. A ProductAsRealized is a specialization of ProductAsIndividualVersion that identifies a revision of an individual artefact that has been made. A product whose properties can only be known by observation or by derivation from observations. NOTE: Where physical products are being represented, the ProductAsRealized represents the physical product - something one can touch. NOTE: The artefact may have been made from a version of a product design ( ProductVersion). If this is the case, then the relationship between the artefact ( ProductAsRealized) and the design ( ProductVersion) is represented by ProductDesignVersionToIndividual. NOTE: The artefact may have been planned and represented by ProductAsPlanned. In which case, the actual artefact ( ProductAsRealized) is related to the planned artefact ( ProductAsPlanned) by the ProductPlannedToRealized relationship. A ProductBasedLocationIdentification is a specialization of LocationRepresentation that specifies a location in the context of a product. Seat number M in the Aircraft. the letters, numbers, or text, or combinations of letters, numbers, and text, that identify a location in the context of a product. NOTE: Such identification can be expressed in functional or physical terms. "1B" - where this is a seat number in an aircraft. the text by which a location in the context of a product is known. The value of this attribute need not be specified. "The co-pilot's seat." the product that provides the context for the location specification. A ProductConcept is the identification of a set of similar products that were, are or will be proposed to customers. NOTE: The definition of product concepts is driven by market and customer requirements and forecasting. A ProductConcept often corresponds to the highest level item(s) manufactured by an organization for customers. In an organization which manufactures cars and engines for cars, the car models will be represented by instances of ProductConcept. NOTE: The entity data type ProductConcept enables to represent customer-oriented identification of products that are to be delivered to customers, while the entity data type Product enables to identify and to track the history of items that are designed and manufactured, as a tangible solution, or component of the solution, for a product concept. NOTE: A product concept may be characterized by a set of product features identified by the customers or derived from customers' needs. NOTE: Depending on the kind of industry and products, a product concept might be offered to the customers in one or many different configurations. a set of Identifiers for the ProductConcept a set of text based descriptions of the ProductConcept. a reference to a class held externally to the exchange file that classifies this ProductConcept This ProductConcept is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the Market for which the ProductConcept is intended. The value of the attribute need not be specified. A ProductConfiguration is the identification of a ProductConcept as a configuration. NOTE: The entity ProductConfiguration corresponds to the concept of configuration item defined, in some configuration management standards, as an item subject to configuration management. A ProductConfiguration may represent a component of a contracted product, onto which severe safety rules apply and for which configuration management is therefore rigorously applied. NOTE: A ProductConfiguration may identify a variation of a ProductConcept, an entire ProductConcept, or some portion thereof. NOTE: A ProductConfiguration can be established prior to the existence of a corresponding product. a set of Identifiers for the ProductConfiguration a set of text based descriptions of the ProductConfiguration. a reference to a class held externally to the exchange file that classifies this ProductConfiguration This ProductConfiguration is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the ProductConcept that defines the context in which the configuration item has been defined. A ProductConfigurationHierarchicalRelationship is a specialization of ProductConfigurationRelationship that is used to represent a hierarchical relationship between a parent ProductConfiguration and a child ProductConfiguration. A ProductConfigurationRelationship is a relationship between a pair of ProductConfigurations. the other instance of ProductConfiguration that is a part of the relationship. If one element of the relationship is dependent upon the other, this attribute shall be the dependent one. A ProductConfigurationRevisionSequence is a specialization of ProductConfigurationRelationship that is used to relate a previous version (predecessor) of a ProductConfiguration to the version that replaces it (successor). A ProductDefinitionElementRelationship is a relationship between a BreakdownElementDefinition or a BreakdownElementUsage and a ViewDefinitionRelationship or a ProductViewDefinition the BreakdownElementDefinition or a BreakdownElementUsage that is related to the ViewDefinitionRelationship or ProductViewDefinition. the ViewDefinitionRelationship or ProductViewDefinition that is related to the BreakdownElementDefinition or a BreakdownElementUsage. A ProductDesignToIndividual is a relationship between a product design, represented by Product, and the product that is planned to be made or has been made from the design, represented by ProductAsIndividual. the design of the product that is being made. the product that has been or is planned to be made from this design. A ProductDesignVersionToIndividual is a relationship between a version of a product design, represented by ProductVersion or ProductConfiguration, and the product that is planned to be made ( ProductAsPlanned) or has been made ( ProductAsRealized) from the design. the version of the product design that is being made. the product that has been or is planned to be made from this version of the design. A ProductDesignViewToIndividual is a relationship between a product design, represented by ProductViewDefinition. or ProductConfiguration, and a view of the product that is planned to be made or has been made ( ProductAsIndividualView) from the design. the product as individual view represented by a ProductAsIndividualView entity. the product design, that is a generalization of a ProductViewDefinition or a ProductConfiguration. A ProductGroup is an identification of a set of ProductConcepts, Products, ProductGroups, ProductVersions or ProductAsIndividuals that have been grouped together. All the aircraft sold to BigPlanes airways. a set of Identifiers for the ProductGroup a set of text based descriptions of the ProductGroup. a reference to a class held externally to the exchange file that classifies this ProductGroup This ProductGroup is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the characteristics that are common to all members of this group. The value of this attribute need not be specified. the context in which the product group has meaning. The value of this attribute need not be specified. The project or equipment end item to which the group belongs. A ProductGroupMembership is an identification of an instance of an entity defined in the type ProductGroupMembershipSelect that belongs to a ProductGroup. a set of Identifiers for the ProductGroupMembership the instance that is a member of the ProductGroup. the ProductGroup to which the instance identified by ProductGroupMembership belongs. A ProductGroupRelationship is a relationship between two ProductGroups. ExternalOwlClass is used to specify the meaning or type of the relationship. NOTE: A subset is a common type of relationship. It indicates that one ProductGroup is a subset of another. a set of Identifiers for the ProductGroupRelationship the other instance of ProductGroup that is part of the relationship. If one element of the relationship is dependent upon the other, this attribute shall be the dependent one. A ProductInAttachmentSlot is a specialization of ViewDefinitionUsage that is a relationship between an AttachmentSlot and a ProductViewDefinition of a Product that is designed to be attached to the attachment slot. A long-range fuel tank is designed to be attached to an aircraft in an attachment slot that corresponds to a pylon mounting on a wing. A ProductPlannedToRealized is a relationship that establishes that a revision of a planned artefact represented by ProductAsPlanned has been realized as a revision of an actual artefact ProductAsRealized. the planned product represented by a ProductAsPlanned entity. the realized product represented by a ProductAsRealized entity. A ProductRelationship is an association between two Products. a set of Identifiers for the ProductRelationship the other instance of Product that is a part of the relationship. If one element of the relationship is dependent on the other, this attribute shall be the dependent one. A ProductVersion is a revision of a Product. It is a collector of the definitions of this revision of the Product. NOTE: The set of all instances of ProductVersion of the same Product represents the history of the product. a set of Identifiers for the ProductVersion a set of text based descriptions of the ProductVersion. a reference to a class held externally to the exchange file that classifies this ProductVersion This ProductVersion is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the views of the ProductVersion. A ProductVersionRelationship is an association between two versions of Product. NOTE: A relationship may exist between ProductVersion of different Product or between different versions of the same Product. the other instance of ProductVersion that is a part of the relationship. If one element of the relationship is dependent up on the other, this attribute shall be the dependent one. A ProductViewDefinition is a characterization of a ProductVersion, relevant in one or more application domains and for one or more life cycle stages. A ProductViewDefinition is a collector of the properties that characterize the ProductVersion in the initialContext and additionalContexts. The design of the SS Titanic and the as-built description of the SS Titanic can be represented as two instances of ProductViewDefinition. a set of Identifiers for the ProductViewDefinition a set of text based descriptions of the ProductViewDefinition. a reference to a class held externally to the exchange file that classifies this ProductViewDefinition This ProductViewDefinition is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the initial ViewDefinitionContext in which the definedVersion has been characterized by the ProductViewDefinition. A Project is an identified program of work. a set of Identifiers for the Project a set of text based descriptions of the Project. a reference to a class held externally to the exchange file that classifies this Project This Project is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the date and time when the Project was actually started. The value of this attribute need not be specified. the date and time when the Project was actually finished. The value of this attribute need not be specified. A ProjectAssignment is a mechanism to associate a Project with activity or product data. the Project that is associated. A ProjectRelationship is an association between two instances of Project with an identification and a description of their relationship. the other instance of Project that is a part of the relationship. If one element of the relationship is dependent upon the other, this attribute shall be the dependent one. A PromissoryAssemblyViewUsage is a specialization of AssemblyViewRelationship. It establishes a relationship between an assembly and a component, regardless of the number of intermediate levels between them, which may be established with instances of NextAssemblyViewUsage. NOTE: A PromissoryAssemblyViewUsage may be used when the product structure is not completely defined, to capture the intent that the constituent will be used in that assembly. A PropertyDefinitionAssignment is a specialization of an AssignmentObject that represents the assignment of a ExternalPropertyDefinition to product or activity data. NOTE: The meaning of the assignment is determined by classification which is identified by the AssignmentObject property. The possible classifications are subclasses of . the ExternalPropertyDefinition that is assigned. To be defined To be defined A PropertyValue acts as a proxy for a notional property value which may have several representations. NOTE: The actual magnitude and descriptions of a PropertyValue (e.g. 1 kilogramme or 2.2 pounds) are only provided as part of one or more representations of a PropertyValue. The PropertyValue itself cannot have a magnitude, or even a name, that is independent of the type of representation chosen for the value in question. a reference to a class held externally to the exchange file that classifies this PropertyValue This PropertyValue is a member of the referenced class. the ExternalPropertyDefinition that defines the property for which the PropertyValue is a value. the MeasureQualification that is that provides information about the uncertainty associated with the measured PropertyValue. A PropertyValueAssignment assigns a PropertyValue (or collection of equivalent PropertyValues) to activity or product data. the PropertyValue, or collection of equivalent PropertyValues, assigned to activity or product data. NOTE: This allows multiple representations of the same conceptual property value to be assigned, each property value should have the same property definition. A collection of mass properties such as "1Kg" and "2.2lb" could be assigned representing the same conceptual mass in different units. the PropertyDefinitionAssignment that provides the context in which the PropertyValue has been assigned. A PropertyValueRelationship is a specialization of RelationshipObject. It represents an association between two PropertyValues. An association between a value for a property expressed in a given unit and an equivalent value for the same property in a different unit. The PropertyValueRelationship is classified as a . the secondary PropertyValue in a property value relationship. PropertyValue A Proxy is a relationship between a subject and something for which the subject is a proxy. A ProxyRelationship is a relationship between a pair of Proxys. NOTE: This relationship may be classified to provide more specific meanings. the other instance of Proxy that is part of the relationship. If one element of the relationship is dependent upon the other, this attribute shall be the dependent one. A QualificationAssignment is the assignment of a qualification to a person or organization. the type of qualification that has been gained by the person or organization. A QualificationType is the identification of a definitive recognition as a practitioner. A driving licence. A qualification for executing the Ground Running task for RB211 engines. A Military rank such as Colonel, or Captain Educational qualification such as GCSE, A level, Degree, Ordinary National Certificate, Higher National Certificate, City and Guilds, or GNVQ. a set of Identifiers for the QualificationType a set of text based descriptions of the QualificationType. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. A QualificationTypeRelationship is an association between two QualificationTypes. Qualification X is a prerequisite for qualification Y. Qualification X is equivalent to qualification Y. the other instance QualificationTypes participating in the relationship. If one element of the relationship is dependent upon the other, this attribute shall be the dependent one. A QualitativeUncertainty is a specialization of UncertaintyQualifier. The uncertainty is defined in clause 2 of "The Guide to the Expression of Uncertainty in Measurement". specifies a STRING for the QualitativeUncertainty. A RandomVariable is a specialization of NumericalValue that is the value of a random variable. NOTE: The value attribute is inherited from the parent generalization. A RegionalCoordinate is a location that is specified relative to a Regional location system. a reference to a class held externally to the exchange file that classifies this RegionalCoordinate This RegionalCoordinate is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the value and unit for the coordinate within the regional location system used. the RegionalGridLocationRepresentation in which the regional coordinate is used. A RegionalGridLocationRepresentation is a specialization of LocationRepresentation that specifies a reference grid system. A RelatedConditionParameter is a relationship between a ConditionParameter and a ConditionEvaluationParameter. This relationship is used to record the relationship between the parameters used to define a condition and the parameters used to evaluate it. The value of oil pressure (1.9 bar) used in ConditionEvaluation (instance 87) was a measured value of the parameter used to define condition 29 (oil pressure on gauge 3). a set of text based descriptions of the RelatedConditionParameter. a reference to a class held externally to the exchange file that classifies this RelatedConditionParameter This RelatedConditionParameter is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the ConditionEvaluationParameter being related. the ConditionParameter being related. A RelatedConsequence is a specialization of ViewDefinitionRelationship describing the expected consequences of a specific perception of a risk. A RelationshipObject represents a dependency between sets of product or activity data. a set of text based descriptions of the RelationshipObject. a reference to a class held externally to the exchange file that classifies this RelationshipObject This RelationshipObject is a member of the referenced class. A RepeatCount is a type of LoopingElement. It invokes a specified number of repetitions of the LoopingElement TaskElement inherited from the LoopingElement parent generalization. the number of times the LoopingElement is to be executed. NOTE: If the RepeatCount entity is combined with the other subtypes of LoopingElement, this becomes the maximum number of repetitions. A RepeatUntil is a type of LoopingElement. It invokes repetitions of a further TaskElement and is repeated until the specified condition is satisfied. The element being repeated shall be executed at least once and the condition tested after the first execution. the criterion to be tested in order to determine that the looping method shall be exited. A RepeatWhile is a type of LoopingElement. It invokes repetitions of a further TaskElement and is repeated while the specified condition is satisfied. The test condition shall be evaluated prior to invoking the method and may result in the LoopingElement not being executed at all. the criterion to be tested in order to determine that the LoopingElement shall be continued. A RequiredResource is an identified need for resource. The role of a required resource is determined by classification. "facility", "test equipment", "supervisor" are examples of classifications of a required resource. a set of Identifiers for the RequiredResource a set of text based descriptions of the RequiredResource. a reference to a class held externally to the exchange file that classifies this RequiredResource This RequiredResource is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the required quantity of the required resource. The value of this attribute need not be specified. Quantity can be specified using amount or duration. a reference to an identifiable item (within the application context) that will satisfy that requirement for a resource. Tool kit, facility, and product category are examples of resource items. A RequiredResourceAssignment is an association of a resource requirement statement with one or more entities that requires the resource. task, task step, activity, activity method, organization are examples of entities to which the resource requirement statement could be related. The role of the assignment is determined by classification. The assignment can be classified as "required by". NOTE: An association between a required resource and actions that are needed prior to its usage. A resource required by the activity "12" needs to be calibrated prior to usage. The calibration activity "21" is associated with the same required resource A resource required by the task "123" needs to be disposed after its usage. This disposal task "456" is associated with the same required resource. the required resource that is to be associated with the requiring entity. A RequiredResourceRelationship is a relationship between two required resource statements. The meaning of the relationship is determined by classification. "alternative" and "realized by" are examples of required resource relationship. a set of Identifiers for the RequiredResourceRelationship the other instance of RequiredResource that is a part of the relationship. If one element of the relationship is dependent upon the other, this attribute shall be the dependent one. A Requirement is a specialization of Product that is used to uniquely identify a requirement. NOTE: The term "requirement" is used here in the sense that term is used in systems engineering and similar industrial domains. NOTE: There may be many versions of a requirement RequirementVersion ). There may also be more than one domain-specific view of a given RequirementVersion (using the RequirementViewDefinition entity). The requirement entity is simply a placeholder for holding a unique requirement. Most associations and properties are defined at the RequirementViewDefinition level - that is in the context of a domain. A requirement may be identified as "NOx emissions requirement", and uniquely identified as "Req2". NOTE: Systems engineering tools and organizations may use differing identification mechanisms. Multiple identifiers may be assigned to a requirement using the Identifier entity. A RequirementAssignment is used to relate a requirement (via the RequirementViewDefinition entity) to data types representing the items which are affected by the requirement. A requirement "the vehicle shall have a maximum power output of at least 150BHP" could be assigned to the data types which are used to represent the vehicle's engine. the RequirementViewDefinition which is assigned. A RequirementCollectionRelationship is a specialization of ViewDefinitionRelationship that is used to relate a parent (collection) requirement to its member requirements. This provides a method for collecting together a set of requirements and treating them as a single requirement, whilst still being able to refer to individual requirements. NOTE: The inherited " ViewDefinitionRelationship" and " ViewDefinitionRelationship" attributes have been renamed for purposes of clarity. A RequirementSatisfiedBy is a relationship between an item (specified in RequirementAssignmentSelect) and a requirement, asserting that the item satisfies the identified requirement. A data type used to represent a vehicle's engine with a power output of 160BHP could be asserted to satisfy a requirement "the vehicle shall have a maximum power output of at least 150BHP". a set of Identifiers for the RequirementSatisfiedBy a set of text based descriptions of the RequirementSatisfiedBy. a reference to a class held externally to the exchange file that classifies this RequirementSatisfiedBy. This RequirementSatisfiedBy is a member of the referenced class. the item that satisfies the requirement. the requirement that is satisfied. the RequirementAssignment that is satisfied by the RequirementSatisfiedBy. The value of this attribute need not be specified. A RequirementSource is a relationship between a requirement (via the RequirementViewDefinition entity) and the data types representing the source of the requirement The source of the requirement "the vehicle shall have a maximum power output of at least 150BHP" could be a document representing the findings of a market survey of sports car buyers. a set of Identifiers for the RequirementSource a set of text based descriptions of the RequirementSource. a reference to a class held externally to the exchange file that classifies this RequirementSource This RequirementSource is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the item which is the source of the requirement. the requirement which is to be related to its source. A RequirementVersion is a specialization of ProductVersion that identifies a particular version of a requirement. NOTE: This entity is used to record different versions of a requirement. In this case, the word "version" implies "revision" - that is a particular release of a requirement. A given requirement might have versions 1.0, 1.1, 1.2 and 2.0. A RequirementVersionRelationship is a specialization of ProductVersionRelationship that is used to relate a previous version (predecessor) of a requirement to the version that replaces it (successor). a set of Identifiers for the RequirementVersionRelationship A RequirementViewDefinition is a specialization of ProductViewDefinition that provides a view of a requirement version relevant for one or more application domains. This view collects requirement data for specific engineering purposes. An engineer may have responsibility for collecting all requirements associated with the cooling of an engine - covering engine block, tubing, water pump, electric fan. Some requirements in a RequirementViewDefinition might impact on different disciplines. Multiple RequirementViewDefinition instances may be used to present different views of a given requirement for each discipline. The definition of the requirement is represented by a set of definitional properties referenced from RequirementViewDefinition.definitionalRepresentations. If more than one definitional property is provided each property shall be equivalent. Any other property that is associated with the RequirementViewDefinition is assumed to be a non-defining property, such as an annotation etc. The requirement that the weight should be less than 4 Kgs can be represented by by a string representation "weight must be 4Kg" and a numeric representation "4Kg" specified as a value with units. NOTE: The definition attribute of each of the definitionalRepresentations shall refer to a definition for RequirementDefinition. The definition attribute of the definitionalRepresentations could refer to an ExternalPropertyDefinition that uses an ExternalOwlObject with individual set to "http://docs.oasis-open.org/plcs/ns/plcslib/v1.0/data/contexts/OASIS/refdata/plcs-rdl#Requirement_definition". the properties that define the requirement A RequirementViewDefinitionRelationship is a specialization of ViewDefinitionRelationship. A RequirementViewDefinitionRelationship is the association between one RequirementViewDefinition and another. A ResourceAsRealized is a record of a resource that has been used or consumed. A resource as realized can be classified as "Used" or "Consumed". a set of Identifiers for the ResourceAsRealized a set of text based descriptions of the ResourceAsRealized. a reference to a class held externally to the exchange file that classifies this ResourceAsRealized This ResourceAsRealized is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the amount of the ResourceAsRealized that has been used or consumed. The value of this attribute need not be specified. The quantity can be recorded as amount or duration. a reference to an item that is provided with resource management capabilities. A ResourceAsRealizedAssignment is an association of a resource record statement with the entity that used or consumed the resource. The role of the assignment is determined by classification. the resource record that is to be associated with one or more activities or tasks that used or consumed the resource. A ResourceAsRealizedRelationship is a relationship between the record of used or consumed resources and the corresponding statement of RequiredResource. "Alternative" and "Corresponding" are examples of classifications of resource as realized relationship. NOTE: A resource used or consumed can be recorded without having a corresponding resource requirement statement. the other instance of that is a part of the relationship. If one element of the relationship is dependent upon the other, this attribute shall be the dependent one. A ResourceEvent is an abstract generalization of instances that represents an event or action that affects the balance or availability of a managed resource. NOTE: Only non-abstract specializations of the ResourceEvent can be instantiated. A ResourceEvent is The role of a resource event is determined by which is defined by the ResourceEvent property. A resource event can be classified as "Planned" or "Actual". a set of Identifiers for the ResourceEvent a set of text based descriptions of the ResourceEvent. a reference to a class held externally to the exchange file that classifies this ResourceEvent This ResourceEvent is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the measure of the amount of resource affected by the change. The value of this attribute need not be specified. the managed resource that is affected by the resource event. A ResourceEventCorrespondenceRelationship is an association of a resource event and a corresponding statement of RequiredResource. The meaning of the relationship is determined by classification. NOTE: A resource event can be planned or recorded without having a corresponding resource requirement statement. A resource event correspondence relationship can be classified as "Designated for". the instance of RequiredResource being related. A ResourceEventRelationship is a specification of how an ResourceEvent may be associated with another ResourceEvent. The meaning of the relationship is determined by classification. A managed resource relationship can be classified as "realized by" or "replaces". the other instance of ResourceEvent that is a part of the relationship. If one element of the relationship is dependent upon the other then this attribute shall be the dependent one. A ResourceGroupRelationship is a specialization of ResourceItemRelationship that specifies the means to associate two resource items that are part of a resource group. The meaning of the entity is determined by classification. The relationship between a tool set and a mallet could be classified as "Contains". The relationship between a facility and compressed air could be classified as "Provides". the measure of the amount of related ResourceItem. The value of the attribute need not be specified. A ResourceItem is an item that can occur in the role of a resource within the application context. A ResourceItem may be classified as "Facility", "Replaceable unit", or "Package". a set of Identifiers for the ResourceItem a set of text based descriptions of the ResourceItem. a reference to a class held externally to the exchange file that classifies this ResourceItem This ResourceItem is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. A ResourceItemAssignment is an association of a resource item with some product information. The role of the assignment is determined by classification. The assignment can be classified as "applicable to" or "acquired for". the resource item that is to be associated with an item. A ResourceItemRealization is a specification of how a resource item may be associated with an item that serves as the resource. A product may serve as a resource. a set of Identifiers for the ResourceItemRealization the item that is to be associated with the resource that it serves as. the resource that is to be associated with an item that serves as that resource. A ResourceItemRelationship is a specification of how a resource item may be associated with another resource item. The role of the relationship is determined by classification. The relationship between a product and a package can be classified as "Preferred". a set of Identifiers for the ResourceItemRelationship the other instance of ResourceItem that is a part of the relationship. If one element of the relationship is dependent upon the other, this attribute shall be the dependent one. A Risk is a specialization of Product that is the potential for realization of unwanted negative consequences of an event. NOTE: ISO GUIDE 73 defines "risk" as the combination of the probability of an event and its consequence. In some situations, risk is a deviation from the expected. NOTE: A risk can also have a possible positive outcome. In such cases it is often referred to as an opportunity or reward. NOTE: ISO/IEC Guide 51:1999 defines risk as the combination of the probability of occurrence of harm and the severity of that harm. NOTE: In the safety field, risk management is focused on prevention and mitigation of harm. ISO/IEC Guide 51:1999 should be used for safety aspects. 'Line shutdown' is an example of Risk in the context of a manufacturing system's reliability. 'Transportation jam-up', 'customer anger', 'collateral damage', and 'greater susceptibility to interruption of supply during crises' are all examples of Risk. 'Privacy' and 'security' are examples of Risk for the telecommunications industry. 'Fly-by-wire', the form-fit-function replacement of mechanical devices with a combination of electrical, hydraulic, and pneumatic units. Timing such as 'premature rejection' and 'premature commitment' are other examples of Risk. A RiskConsequence is a specialization of RiskViewDefinition and specifies the outcome of an event. NOTE: There may be one or more consequences of an event. NOTE: Consequences can range from positive to negative. However, consequences are always negative for safety aspects. NOTE: Consequences can be expressed qualitatively or quantitatively. A RiskEvent is a specialization of an AssignmentObject that represents the unwanted (or wanted) event resulting in the RiskPerception. The probability of the event occurring is represented by a set of probabilities referenced from RiskEvent.probabilityRepresentations. If more than one probability is provided each probability shall be equivalent. NOTE: The definition attribute of the probabilityRepresentations shall refer to a definition for perceivedProbability. The definition attribute of the probabilityRepresentations could refer to an ExternalPropertyDefinition that uses an ExternalOwlObject with individual set to "http://docs.oasis-open.org/plcs/ns/plcslib/v1.0/data/contexts/OASIS/refdata/plcs-rdl#Perceived_Probability". the ActivityMethod that defines the event. the probability representations of the risk event occurring. A RiskImpactAssignment is a specialization of AssignmentObject and a type of PropertyAssignmentSelect. It assigns a set of items that might be impacted to the RiskConsequence that is the cause of the effect. the items impacted by the RiskConsequence. A RiskPerception is a specialization of RiskViewDefinition that defines values or concerns (a risk level) with which a stakeholder views a particular Risk. The risk level is represented by a set of property values referenced from RiskPerception.riskLevelRepresentations. If more than one property value is provided each property value shall be equivalent. One riskLevelRepresentation could be 4 (from a maximum of 5) and a second could be "high". NOTE: The definition attribute of each of the riskLevelRepresentations shall refer to a definition for RiskLevel. The definition attribute of the riskLevelRepresentations could refer to an ExternalPropertyDefinition that uses an ExternalOwlObject with individual set to "http://docs.oasis-open.org/plcs/ns/plcslib/v1.0/data/contexts/OASIS/refdata/plcs-rdl#Risk_Level". NOTE: RiskPerception depends on the stake holder's expressed needs, issues, and knowledge. NOTE: RiskPerception can differ from objective data. NOTE: RiskPerception may be used qualitatively or quantitatively to form a risk matrix. NOTE: Risk will be perceived differently in different contexts, such as in the context of human safety, mission success, project time schedule, performance or economy. optionally defines a collection of representations for an identifiable goal or objective for the RiskPerception. A RiskPerceptionRelationship defines an association between two instances of RiskPerception. A RiskPerceptionSourceAssignment is a specialization of AssignmentObject. It assigns a set of one or many items that are the source for a RiskPerception to the RiskPerception. the items which are identified as the source of the RiskPerception. A RiskRelationship is a specialization of ProductRelationship. It is an association between two an association between two instances of Risk. A RiskVersion is a specialization of ProductVersion. It defines a form of a risk that differ in certain respects from an earlier form of that risk or from other forms of that risk. NOTE: Use of RiskVersion allows several RiskPerception instances to be assigned to a specific Risk. ARiskViewDefinition is a specialization of a ProductViewDefinition  and is an abstract generalization of instances that represents … NOTE: Only non-abstract specializations of the RiskViewDefinition can be instantiated. A Scheme is a specialization of ActivityMethod. It provides the identification and description of an intended course of action to accomplish an objective. A Scheme enables the ordering of entries. Dates and times may be specified for entries and time intervals between entries. NOTE: A Scheme may be classified as a Plan or Schedule, and it may be further classified into specific types of Plans or Schedules. Acquisition plan, Maintenance plan, Resource schedule are examples of schemes. the versions of the Scheme A SchemeEntry is a specialization of ActivityMethod that provides the identification and description of a single entry in a specific Scheme. NOTE: A SchemeEntry may be associated with time constraints. NOTE: A SchemeEntry only exists within the scope of a specific Scheme. A SchemeEntryAssignment is a specialization of an AssignmentObject that represents the assignment of SchemeEntry instances to instances that are specializations of SchemeEntryAssignmentSelect. NOTE: The meaning of the assignment is determined by classification which is identified by the AssignmentObject property. The possible classifications are subclasses of . NOTE: The SchemeEntryAssignment links the single items included in Plans and Schedules with their associated SchemeEntry. These items may be actions, events, or tasks depending on the nature of the Plan or Schedule. the SchemeEntry that is assigned to activity or product data. A SchemeEntryRelationship is a specialization of ActivityMethodRelationship. It relates two SchemeEntry entities. An association may exists between SchemeEntry entities that relate to different Scheme or between different SchemeEntry entity instances for the same Scheme. NOTE: The SchemeEntryRelationship provides the ability to relate entries included in Plans or Schedules in different ways. By applying classifications on the SchemeEntryRelationship it can be used for different purposes. Decomposition, Dependency, and sequencing are examples of kinds of relationships possible between schema entries. A SchemeRelationship is a specialization of ActivityMethodRelationship relating two Schemes. NOTE: The SchemeRelationship provides the ability to relate Plans or Schedules represented by the Scheme entity in different ways. If classifications are available to the schema using this on, by applying classifications on the SchemeRelationship it can be used for different purposes. Decomposition, based-on, alternative, version are kinds of relationships between Schemes. A SchemeSubjectAssignment is a specialization of an AssignmentObject that represents the assignment of Scheme with a specific subject. NOTE: The meaning of the assignment is determined by classification which is identified by the AssignmentObject property. The possible classifications are subclasses of . NOTE: The SchemeSubjectAssignment links the Plans and Schedules with their associated subjects or targets. This may indicate the intent of the scheme. The maintenance plan for an individual vehicle, where the subject attribute points to an entity instance representing the individual vehicle. the Scheme that is assigned to a specific subject. A SchemeVersion is a specialization of ActivityMethod. It enables version control of Scheme. the SchemeEntrys that are within a SchemeVersion. A SchemeVersionAssignment is a specialization of an AssignmentObject that represents the assignment of a SchemeVersion instances to instances that are specializations of SchemeVersionAssignmentSelect. NOTE: The meaning of the assignment is determined by classification which is identified by the AssignmentObject property. The possible classifications are subclasses of . the SchemeVersion assigned to a set of items A SchemeVersionRelationship is a specialization of ActivityMethodRelationship relating two SchemeVersions. NOTE: The meaning of the relationship is determined by classification which is identified by the RelationshipObject property. The possible classifications are subclasses of . A SecurityClassification is a level of confidentiality that can be applied to protect activity or product data against unauthorized usage. a set of Identifiers for the SecurityClassification a set of text based descriptions of the SecurityClassification. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file that provides the definition of the SecurityClassification. A SecurityClassificationAssignment is an association of a SecurityClassification with activity or product data. the SecurityClassification assigned to activity or product data. A SelectedItemAssignment is the identification of the product or activity data referenced by SelectedItemAssignment as being a member of a class identified by ClassSelect. the class to which the product or activity data referenced by SelectedItemAssignment belongs. the context in which the product or activity data is being identified as being a ClassSelect. The engine is a identified as a selected item on the car. A SequenceOfState is a specialization of StateRelationship in which one set of State precedes another set of State. A SequenceOfStateDefinition is a specialization of StateDefinitionRelationship. It defines a sequence of two or more state definitions. A SequencingRelationship is a specialization of SchemeEntryRelationship. It defines a specific type of sequencing and relative timing for two SchemeEntry. NOTE: Specific types of sequencing could include start-start, finish-start. the amount of time, either positive or negative, before the sequencing applies between the SchemeEntryRelationship and the SchemeEntryRelationship. The value of this attribute need not be specified. NOTE: For a positive timeLag, the SchemeEntryRelationship is the later entry in time. A SerialEffectivity is a specialization of Effectivity for which the domain of applicability is defined as a possibly open-ended interval of serial numbers. the first valid serial number. the last valid serial number. The value of the attribute need not be specified. If the value for this attribute is not specified, the interval of applicability has no upper bound. ASetMembership is a relationship that is between a set and a thing that indicates the thing is a member of the set. NOTE: the term 'class' and 'set' are synonyms. the member of the set the set that has the thing as a member A ShapeDependentPropertyRepresentation is the representation of a characteristic derived from or imposed to an ItemShape or a ShapeElement. The centre of mass is an example of shape dependent property, of a shape, that can be represented by a cartesian point. The area and the volumes are examples of characteristic that can be represented by a measure value with unit. NOTE: A ShapeDependentPropertyRepresentation is independent of the representations of the shape. a set of text based descriptions of the ShapeDependentPropertyRepresentation. the string that specifies the type of the characteristic that is represented. Where applicable, the following values shall be used: 'centre of mass': the characteristic is the centre of the mass of the describedElement, evaluated or required independently of any representation of the describedElement; 'centroid': the characteristic is the centre of mass of a body as evaluated from a geometric representation of the describedElement; NOTE: An instance of GeometricModelRelationship may be used to relate the characteristicType with the GeometricModel from which the centroid was computed. 'moment of inertia': the characteristic is the 3*3 matrix of inertia of the describedElement; 'surface area': the characteristic is the extent of the surface of the describedElement; 'volume': the characteristic is the volume of the describedElement. the ItemShape or the ShapeElement from which the characteristic has been derived or imposed. the PropertyValue that contains the items that express the characteristic. NOTE: Depending on the characteristicType, the describedElement may need to be a GeometricModel. A ShapeDescriptionAssociation is an association of a geometric representation with a shape characteristic. a set of text based descriptions of the ShapeDescriptionAssociation. the instance of an element of ShapeSelect that is represented. In case the representedCharacteristic is a ShapeElementRelationship, the represented characteristic is the related ShapeElement in the context of its relating ShapeElement. the GeometricModel that provides the representation. A ShapeElement is a portion of a shape. The threaded portion of the shape of a bolt may be represented as a ShapeElement, so that other properties, such as surface finish, may be associated with it. a set of text based descriptions of the ShapeElement. the name of the ShapeElement. The value of this attribute need not be specified. the ItemShape that the ShapeElement is a part of. A ShapeElementRelationship is a relationship between two instances of ShapeElement. a set of Identifiers for the ShapeElementRelationship the other instance of ShapeElement that takes part in the relationship. A ShapePlacementAssociation is a specialization of ShapeDescriptionAssociation. A SimultaneousElements is a specialization of ConcurrentElements that represents two or more actions to be performed together. A StandardUncertainty is a specialization of UncertaintyQualifier. A StandardUncertainty may be an ExpandedUncertainty. The uncertainty is defined in clause 2 of "The Guide to the Expression of Uncertainty in Measurement". specifies a REAL value of the uncertainty. A StartTask is a type of TaskElement. It signifies the start point of the task. NOTE: Not all formal task description require start and end elements, their inclusion is in a sequence is optional. A State is the mode of being in which something does or could exist or existed for a period of time. NOTE: A state's existence can be just a state that an instance is currently in, a predicted state that an instance will eventually be in, or an observed state that an instance has been in. NOTE: The period of existence may be an instant or longer. Main Engine No. 1 is in "operation". When Generator No. 2 surpasses 5,000 service hours, it will enter "maintenance" mode. The portable computer's power supply was attached after it displayed a "low-battery" warning. a set of Identifiers for the State a set of text based descriptions of the State. a reference to a class held externally to the exchange file that classifies this State This State is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. A StateAssertion is used to assert that the subject State is in conformance with a particular StateDefinition. a set of Identifiers for the StateAssertion a set of text based descriptions of the StateAssertion. a reference to a class held externally to the exchange file that classifies this StateAssertion This StateAssertion is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the subject State being asserted. a particular StateDefinition the subject State is being asserted against. A StateAssessment is used to determine whether the subject State is comparable with a particular StateDefinition. a set of Identifiers for the StateAssessment a set of text based descriptions of the StateAssessment. a reference to a class held externally to the exchange file that classifies this StateAssessment This StateAssessment is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. a subject State that will be assessed against a particular StateDefinition. a particular StateDefinition the subject State is assessed against. An StateAssignment is a relationship that allows a subject to have State or to be in a State. a State the subject has or is in. A StateCauseEffect is a specialization of state relationship and it relates two or more states as one state causing particular resulting effect state(s). In turn, an effect state can become a new causing state yielding in yet more effect states. A StateCauseEffectDefinition is a specialization of StateDefinitionRelationship that is used to define a causal relationship between two sets of StateDefinition entities. At least one StateDefinition acts as a cause and at least one StateDefinition acts as a effect. NOTE: Additional causal relationships between states can be expressed using the following subtypes: AndStateCauseEffectDefinition, OrStateCauseEffectDefinition, and XorStateCauseEffectDefinition. A StateComplementDefinition is a specialization of StateDefinitionRelationship. It is a relationship among three sets of StateDefinition entities. It defines the complement of a set of StateDefinition entities relative to a set of StateDefinition entities that are the universe. NOTE: The semantics are the same as in elementary set theory. NOTE: The relationship between a StateDefinition and its complement is symmetrical. A StateDefinition is a mode of being. In formal systems, a StateDefinition is the definition of a situation during which some (usually implicit) invariant condition holds. a set of Identifiers for the StateDefinition a set of text based descriptions of the StateDefinition. a reference to a class held externally to the exchange file that classifies this StateDefinition This StateDefinition is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file that provides the definition of the StateDefinition. An StateDefinitionAssignment is a mechanism that enables an instance to have or to be in a StateDefinition. the StateDefinition that is assigned. A StateDefinitionRelationship is an association between two or more instances of StateDefinition. NOTE: Relationships between StateDefinition entities may be used to support fault diagnosis. a set of Identifiers for the StateDefinitionRelationship the other of the instances of StateDefinition that is a part of the relationship. A StateObserved is a specialization of State. It is an individual or realized State that is observed. A StatePredicted is a specialization of State It is a predicted actual State. Where a predicted state needs to be related to an observed state, the StatePredictedToObserved entity shall be used. A StatePredictedToObserved is a specialization of state relationship. It specifies the relationship between two individual states, one of which is a StatePredicted to a second state which is a StateObserved. A StateProperSubsetDefinition is a specialization of StateDefinitionRelationship. It is a relationship between two sets of StateDefinition entities. NOTE: The relationship between a state and its environment can be described as a StateProperSubsetDefinition. The identification of an intrinsic state is the properSubset. The identification of an extrinsic state is the properSuperset. A StateRelationship is a relationship between two or more State. a set of Identifiers for the StateRelationship the other of the set of instances of State that is a part of the relationship. A StateSubsetDefinition is a specialization of StateDefinitionRelationship. It is a relationship between two sets of StateDefinition entities. NOTE: The first set may be equal to the second set. A StateSymptomDefinition is a specialization of StateDefinitionRelationship. It relates two or more StateDefinition entities in regards to symptom, where a symptom is something that indicates the existence of something else. At least one StateDefinition acts as a symptomCause and at least one StateDefinition acts as a symptomEffect. A StateTransition is a specialization of state relationship and it relates two or more states before and after a transition in State, where at least one State is a start state and at least one State is an end state. A StateTransitionDefinition is a specialization of StateDefinitionRelationship. It relates two or more StateDefinition entities before and after a transition in state, where at least one StateDefinition is a startState and at least one StateDefinition is an endState. A StringValue is a specialization of PropertyValue that represents a sequence of one or more alphanumeric characters. specifies the string represented by the StringValue. A StructuredTaskElement is a type of TaskElement. It is made up of other TaskElements ASubsetMember is a relationship that is between: set A; and set B. that indicates: each member of set A is also a member of set B. NOTE: Set A may be equal to set B. the set that contains all members of subset. the set that contains only members of superset. A SuppliedPartRelationship is a specialization of ProductVersionRelationship that relates two instances of ProductVersion that represent the same instance in different organizational contexts. One of the organizations is the supplier of the instance to the other organization. This entity is applicable for part versions and document versions. NOTE: This entity enables to represent the fact that two organizations may use distinct identifiers to identify their Product and their versions. NOTE: This mechanism can only be used in an information system or in exchange files where the content of the id attribute of instances of Product is not constrained by a particular identification scheme. A System is a specialization of Product used to identify a conceptual solution to a collection of requirements. NOTE: The concept system is any thing - matter, energy, organisation or information or a combination of these - for which reproducible measurements exist. The concept system excludes any asserted thing based on personal experience for which no reproducible measurements exist. NOTE: SEDRES Definition: "An assembly of interacting, active components or elements forming a whole". NOTE: Another definition would be "That which is discernible by reproducible measurement of its characteristics, and has a defined boundary (statically and dynamically) with respect to the universe". A SystemBreakdown is a specialization of Breakdown that identifies a partitioning of a system into a set of related elements so as to form explicit, assembly - component views that comprise the system elements. The assembly-component view is represented by SystemElementUsage instances relating the system elements in the breakdown which are represented by SystemElements. A system breakdown provides a decomposition of an aircraft in terms of high-level mechanisms such as fuel system or flight control system - which might, in the second example, further decompose into low-level systems such as autopilot system and instrument landing system. A SystemBreakdownContext is a specialization of BreakdownContext that is a membership relationship between a SystemElement and a SystemBreakdown of which the system element is a member. A heating system is a member of the breakdown of a climate control system. A SystemBreakdownVersion is a specialization of BreakdownVersion that identifies a version of a SystemBreakdown A logistics engineer modifies the current systems breakdown for an aircraft and associated support equipment on the basis of results from a level of repair analysis. A SystemElement is a specialization of BreakdownElement that identifies the elements in one or more SystemBreakdown instances. A SystemElementDefinition is a specialization of BreakdownElementDefinition that identifies a view of a version ( SystemElementVersion) of a SystemElement. The collision avoidance system element of a system breakdown is subject to a level of repair analysis to support implementation of optimized maintenance for an aircraft. A SystemElementUsage is a specialization of BreakdownElementUsage that is a relationship between a SystemElementDefinition and another SystemElementDefinition that is a constituent. In a system breakdown, the fuel system might include a fuel storage system and a fuel injection system as components. A SystemElementVersion is a specialization of BreakdownElementVersion that identifies a version of a SystemElement A sound engineer changes the details describing the public address system that is an element in a system breakdown of an aircraft. A SystemVersion is a specialization of ProductVersion that represents a particular version of a system. NOTE: In this case, this means "revision". So for a given system (e.g. a fuel injection system) we may have several versions of the system design (e.g. v1, v1.1 etc.) A SystemVersionRelationship is a specialization of ProductVersionRelationship used to relate versions of a system. A SystemVersionSequence is a specialization of SystemVersionRelationship used to relate a previous version of a system to the version that replaces it. A SystemViewDefinition is a specialization of ProductViewDefinition that provides a view of a system version relevant for one or more application domains. A TaskElement is a specialization of ActivityMethod. It is a representation of all or part of how to undertake a task. A TaskElementAssignment is a specialization of an AssignmentObject that represents the assignment of TaskElement instances to instances that are specializations of TaskAssignmentSelect. NOTE: The meaning of the assignment is determined by classification which is identified by the AssignmentObject property. The possible classifications are subclasses of . the TaskElement that is assigned. A TaskElementLevels is a type of TaskElement that provides two or more different descriptions in place of a single method. The actual work will be the same whichever alternative TaskElement is followed. NOTE: This can be used to provide different levels of description of a task for people with varying levels of experience or expertise. the TaskElements describing two or more ways in which the same work may be undertaken. A TaskElementRelationship is a specialization of ActivityMethodRelationship. It relates two instances of TaskElement. Can be used to capture a time dependency that cuts across the structure of the method. A TaskElementSequence is a specialization of TaskElement that comprises a sequence of steps to be followed in a specified order. the TaskElements to be followed in the order specified in the list. A TaskElementStateRelationship is an type of ActivityMethodRelationship. It is an association between a State or a StateDefinition and a TaskElement. The meaning of the entity is determined by classification. Candidate meanings include: assumed starting state; required starting state. a set of Identifiers for the TaskElementStateRelationship the State or StateDefinition being related. A TaskInvocation is a type of TaskElement. It is an instruction to perform another task. A TaskElement calls a predefined task to perform an instrument calibration. the TaskMethod to be invoked. A TaskMethod is a specialization of ActivityMethod. It is a specification of work. NOTE: The task method may be implemented using people, machines or a combination. the versions of the TaskMethod. A TaskMethodAssignment is a specialization of an AssignmentObject that represents the assignment of TaskMethod instances to instances that are specializations of TaskAssignmentSelect. NOTE: The meaning of the assignment is determined by classification which is identified by the AssignmentObject property. The possible classifications are subclasses of . the TaskMethod being assigned. A TaskMethodRelationship is a specialization of ActivityMethodRelationship. It relates two task methods. NOTE: The meaning of the relationship is determined by classification which is identified by the RelationshipObject property. The possible classifications are subclasses of . A TaskMethodStateRelationship is a relationship between a state and a TaskMethod. NOTE: The meaning of the entity is determined by classification. Candidate meanings include: Assumed starting state; Required starting state. a set of Identifiers for the TaskMethodStateRelationship the mode of being that is related. A TaskMethodVersion is a specialization of ActivityMethod which allows the explicit reference to versions of a TaskMethodand to track changes against a TaskMethod. the way in which the task is to be carried out. The value of this attribute need not be specified. A TaskMethodVersionAssignment is a specialization of an AssignmentObject that represents the assignment of TaskMethodVersion instances to instances that are specializations of TaskAssignmentSelect. NOTE: The meaning of the assignment is determined by classification which is identified by the AssignmentObject property. The possible classifications are subclasses of . the TaskMethodVersion that is assigned. A TaskMethodVersionRelationship is a specialization of ActivityMethodRelationship. It relates two instances of TaskMethodVersion. A TaskObjective is a result or objective that is reached by undertaking a TaskMethod. NOTE: More than one TaskMethod may be defined for a given objective, if there can be several ways to accomplish the objective. a set of Identifiers for the TaskObjective a set of text based descriptions of the TaskObjective. a reference to a class held externally to the exchange file that classifies this TaskObjective This TaskObjective is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. A TaskObjectiveStateRelationship is a relationship between a state and a TaskObjective. NOTE: The meaning of the entity is determined by classification. Candidate meanings include: Intended finishing state; Alternative finishing state. a set of Identifiers for the TaskObjectiveStateRelationship the mode of being that is related. A TaskStep is a specialization of TaskElement that is not further sub-divided. the text describing what is to be done to accomplish the TaskStep A TimeInterval is the identification of an intervening time. a set of Identifiers for the TimeInterval. a set of text based descriptions of the TimeInterval. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. A TimeIntervalAssignment is an association of a TimeInterval with product data. the instance of the TimeInterval entity data type that is associated with product data. A TimeIntervalEffectivity is a specialization of Effectivity for which the domain of applicability is defined as a TimeInterval. the TimeInterval that defines the domain of validity. A TimeIntervalRelationship is the association of two instances of TimeInterval. The meaning of this association is specified in the TimeIntervalRelationship attribute. the other instance of TimeInterval. If one element of the relationship is dependent upon the other, this attribute shall be the dependent one. A TimeIntervalWithBounds is a specialization of TimeInterval. A TimeIntervalWithBounds is bounded either on one side or both sides. If neither secondaryBound nor NumericalValue by the durationFromPrimaryBound are specified, the time interval begins at the point in time identified by primaryBound and has no specified end point. the duration that specifies the length of the time interval from the primary bound. If positive, the TimeIntervalWithBounds defines a lower bounded time interval, else an upper bounded time interval. The value of this attribute need not be specified. A TracingRelationship is a specialization of ViewDefinitionRelationship that shows tracing from ( TracingRelationship) one requirement to another ( TracingRelationship). A requirement on the performance of a catalytic converter in a car may be traced from a more general emissions requirement. A requirement may trace to many other requirements and vice versa - this is achieved by creating multiple instances of the tracing relationship entity. NOTE: The inherited " ViewDefinitionRelationship" and " ViewDefinitionRelationship" attributes have been renamed for purposes of clarity. NOTE: Properties may be attached to tracing relationships. This is intended to deal with "user defined" attributes which are common on tracing relationships in requirements tools. A TypeOfPerson is a type of person. Class 3 welder Truck driver Electronics engineer Mechanical technician Helicopter pilot a set of Identifiers for the TypeOfPerson a set of text based descriptions of the TypeOfPerson. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. A TypeOfPersonAssignment is the association of a TypeOfPerson in a role with an activity or product data. the TypeOfPerson that is to be assigned. A TypeOfPersonDefinition is the definition of a TypeOfPerson in terms of required properties or attributes. A junior mechanical design engineer could be specified to be either someone who has 3 years experience of working in a mechanical design department, or a degree in mechanical engineering. a set of Identifiers for the TypeOfPersonDefinition a set of text based descriptions of the TypeOfPersonDefinition. a reference to a class held externally to the exchange file that classifies this TypeOfPersonDefinition This TypeOfPersonDefinition is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. A TypeOfPersonDefinitionRelationship is a relationship between two definitions of a type of person (TypeOfPersonDefinition). A TypeOfPersonDefinitionRelationship is a specialization of a RelationshipObject that is a relationship between two instances of a type of person (TypeOfPersonDefinition). "alternate" and "superceded by" are examples of TypeOfPersonDefinitionRelationships. NOTE: The meaning of the relationship is determined by classification which is identified by the RelationshipObject property. The possible classifications are subclasses of . the other instance of TypeOfPersonDefinition that is a part of the relationship. If one element of the relationship is dependent upon the other, this attribute shall be the dependent one. A TypeOfPersonDefinitionRequiredAttributesRelationship is a relationship between a TypeOfPersonDefinition and the attributes required to define that type of person. The type of person "van driver" is required to possess the qualification named "commercial driving license" or the experience level "3 years of driving more than 10,000 miles per year". the required attributes of a person. Must have a degree Must have 10 years experience An UncertaintyQualifier is a generalization of a StandardUncertainty or a QualitativeUncertainty. The uncertainty is defined in clause 2 of "The Guide to the Expression of Uncertainty in Measurement". a set of text based descriptions of the UncertaintyQualifier. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. specifies the STRING that serves to identify the UncertaintyQualifier. A Validation is a subjective assertion that an item is "fit for purpose". Evidence used in this validation is identified by the inverse attribute validatedBy. Validation is commonly understood to mean "Have we built the right system?". Validation is concerned with ensuring that the system will meet the customer’s objectives and expectations. Validation usually includes testing under normal usage conditions. NOTE: An item may pass validation even though some requirements fail verification. NOTE: It is assumed that meta data supporting the validation will be applied using assignment entities, such as identification assignment, person and organization assignment etc.. Every flight of every Space Shuttle has been a "Validation" flight to test the new design under actual conditions. No two shuttles have flown in the same configuration and many systems cannot be validated except under actual conditions. a set of Identifiers for the Validation a set of text based descriptions of the Validation. a reference to a class held externally to the exchange file that classifies this Validation This Validation is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. identifies the item which is been validated by this entity. A ValueFunction is a numerically defined function that describes the distribution function. A ValueLimit is a specialization of NumericalValue that specifies a qualified numerical value representing either the lower limit or the upper limit of a particular quantifiable characteristic. There shall exist exactly one PreDefinedTypeQualifier for the ValueLimit. It shall be classified as 'minimum' or 'maximum'. A ValueList is a specialization of PropertyValue that is an ordered collection of PropertyValues. A PropertyValue may be composed of different values such as 'mass', 'speed', and 'age' which are all necessary in a given context. The ValueList collects all of them in a given order, such that each is identifiable by its index in the list. the values. A ValueRange is a specialization of ValueWithUnit that is a pair of numbers representing the range in which the value shall lie. the lower limit. the upper limit. A ValueSet is a specialization of PropertyValue that is an unordered collection of PropertyValues. A PropertyValue may be composed of different values such as 'mass', 'speed', and 'age' which are all necessary in a given context. The ValueSet collects all of them in a given order, such that each is identifiable by its index in the list. the values. A ValueWithTolerances is a specialization of ValueWithUnit that specifies a range of values by specifying a single nominal value and two tolerances that are offsets from the single value. The range is defined to be the closed interval [item value + lower limit, item value + upper limit]. specifies the single value that is the base value for specifying the range. the lower limit of the range. the upper limit of the range. A ValueWithUnit is a specialization of a PropertyValue and is an abstract generalization of instances that represents the specification of a physical quantity by its value and its unit. NOTE: Only non-abstract specializations of the ValueWithUnit can be instantiated. the ExternalUnit with which the physical quantity is expressed. specifies the number of decimal digits that are relevant for the ValueWithUnit. If present, the numerical measure or range may be specified using more digits than the significant digits but shall not be specified using less digits. The value of this attribute need not be specified. A Verification is an objective assertion of a claim that requirement is satisfied by a particular item represented in a RequirementSatisfiedBy has been verified. The evidence used in this verification is identified by the inverse attribute verifiedBy. Verification is commonly understood to mean "Have we built the system right?". Verification ensures that the specified requirements have been met. Verification uses the methods of Test, Analysis, Inspection, Demonstration, Similarity. NOTE: Just because an item is verified does not ensure that it meets all stakeholder needs or expectations, many of these are never specified are of an un-testable nature e.g. "the car should look sporty". NOTE: It is assumed that meta data supporting the verification will be applied using assignment entities, such as identification assignment, person and organization assignment etc.. A data type used to represent a vehicle's engine with a power output of 160BHP could be asserted to satisfy a requirement "the vehicle shall have a maximum power output of at least 150BHP". This assertion may be verified by analysis results on simulations of the engine. In this case the analysis results would be identified in the items collection of an evidence instance, possibly including the approval of the analysis. The evidence instance would identify that it is used to support the required verification. a set of Identifiers for the Verification a set of text based descriptions of the Verification. a reference to a class held externally to the exchange file that classifies this Verification This Verification is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the claimed requirement satisfaction by a particular item which is been verified by this entity. A VerificationRelationship is an association between two verifications. NOTE: The meaning of the relationship is determined by classification which is identified by the RelationshipObject property. The possible classifications are subclasses of . the other verification in this relationship. An ViewDefinitionContext is the grouping of an application domain and a life cycle stage. It identifies a universe of discourse suitable for the description of products. NOTE: Requirements and vocabularies vary among the industrial activity fields. This entity intends to identify such a domain. the text that identifies the application context that bounds the universe of discourse. 'assembly study', 'digital mock-up', 'electrical design', 'mechanical design', 'preliminary design', 'process planning' are examples of application domains If applicationDomain is an empty string, the ViewDefinitionContext shall be considered as not specific of any application domain. a set of text based descriptions of the ViewDefinitionContext. the text that identifies a stage in the life cycle of a product. 'design phase', 'production', 'recycling phase' are examples of life cycle stages. If lifeCycleStage is an empty string, the ViewDefinitionContext shall be considered as not specific of any life cycle stage. A ViewDefinitionRelationship is an association between two instances of ProductViewDefinition. This association represents a relationship between the product versions, indirectly identified by the instances of ProductViewDefinition, relevant in the definition contexts of the related instances of ProductViewDefinition. a set of Identifiers for the ViewDefinitionRelationship the other instance of ProductViewDefinition that is part of the relationship. If one element of the relationship is dependent upon the other, this attribute shall be the dependent one. A ViewDefinitionUsage is a specialization of ViewDefinitionRelationship that specifies a directed association between two instances of ProductViewDefinition. This association represents a relationship stating that, in the definition contexts of the related instances of ProductViewDefinition, it is considered that the related product is used in the context of the relating product. A WorkOrder is an authoritative instrument which provides directions to achieve the specified results. A WorkOrder is the authorization for one or more Activity instances to be performed. a set of Identifiers for the WorkOrder a set of text based descriptions of the WorkOrder. a reference to a class held externally to the exchange file that classifies this WorkOrder This WorkOrder is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. An WorkOrderAssignment is an association of a WorkOrder with the product or activity data that are subjects of this WorkOrder. In case a tyre on a car is flat, a WorkOrder may be created and associated with the instances that represent the tyre that is flat, the car and the spare wheel. the WorkOrder for which a set of items is being identified. A WorkOutput is a statement of output resulting from an activity or a task. The role of the work output is determined by classification. When applicable a work output may be classified as "Planned"; "Actual"; "By-product"; "Waste product". a set of Identifiers for the WorkOutput a set of text based descriptions of the WorkOutput. a reference to a class held externally to the exchange file that classifies this WorkOutput This WorkOutput is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the amount of output resulting from the associated activity or task. The value of this attribute need not be specified. a reference to a detailed representation of the item that is defined as the work output. It can refer to an actual as well as to a type of item. The value of this attribute need not be specified. A work output can be a product or a certificate. A WorkOutputAssignment is an association of a work output statement with the source that produces or delivers the output. The work output can be planned as well as actual. The role of the assignment is determined by classification. the work output that is to be associated with one or more activities or tasks that produce or deliver the output. A WorkOutputRelationship is a relationship between two work output statements. The meaning of the relationship is determined by classification. A WorkOutputRelationship is classified as "realized by" . the other instance of WorkOutput that is a part of the relationship. If one element of the relationship is dependent upon the other, this attribute shall be the dependent one. A WorkRequest is the solicitation for some work to be done. NOTE: These requests may not be acted upon depending on the authorization granted to the request or its associated WorkOrder. a set of Identifiers for the WorkRequest a set of text based descriptions of the WorkRequest. a reference to a class held externally to the exchange file that classifies this WorkRequest This WorkRequest is a member of the referenced class. a reference to an ExternalOwlClass or an ExternalItem held externally to the exchange file for which this is a proxy. the identification of the version of the WorkRequest. An WorkRequestAssignment is an association of a WorkRequest with the product or activity data that are subjects of this WorkRequest. In case a tyre on a car is flat, a WorkRequest may be created and associated with the instances that represent the tyre that is flat, the car and the spare wheel. the WorkRequest for which a set of items is being identified. AWorkRequestRelationship is a specialization of an RelationshipObject that is a relationship between two instances of WorkRequest. NOTE: The meaning of the relationship is determined by classification which is identified by the RelationshipObject property. The possible classifications are subclasses of . the second instance of WorkRequest that is part of the relationship. NOTE: NOTE: If one WorkRequest in the relationship is dependent upon the other, this attribute shall be the dependent one. An XorStateCauseEffectDefinition is a specialization of StateCauseEffectDefinition. It relates one of the single or many causing state definition(s) and one effect StateDefinition, whereby any and only one of the causing state definitions exists prior to the single effect to take place. A ZoneBreakdown is a specialization of Breakdown that identifies a partitioning of a product into a set of related zonal elements so as to form explicit, parent-child views that comprise the product elements. The parent-child view is represented by ZoneElementUsage instances relating the zonal elements in the breakdown which are represented by ZoneElements. A zonal breakdown provides a means of identifying the decomposition of an aircraft in terms of spaces or high-level conceptual parts such as 'wing' - which might further decompose into lower-level zones such as 'inner-wing', and 'outer wing'. A ZoneBreakdownContext is a specialization of BreakdownContext that is a membership relationship between a ZoneElement and a ZoneBreakdown of which the zonal element is a member. A 'fire-check zone' might be a member of the zonal breakdown of a building. A ZoneBreakdownVersion is a specialization of BreakdownVersion that identifies a version of a ZoneBreakdown An architect modifies the current fire-check zone breakdown for an building on the basis of reports from a buildings inspector. A ZoneElement is a specialization of BreakdownElement that identifies the elements in one or more ZoneBreakdown instances. 'Empennage', 'Right vertical stabilizer and rudder' and 'Lower rudder' are all elements in a zonal breakdown of an aircraft. A ZoneElementDefinition is a specialization of BreakdownElementDefinition that identifies a view of a version ( ZoneElementVersion) of a ZoneElement. For an aircraft, an element 'Right vertical stabilizer tip' is in a zonal breakdown that an engineer uses for reliability-centred maintenance analysis. A ZoneElementUsage is a specialization of BreakdownElementUsage that is a relationship between a parent and child ZoneElement. In a zonal breakdown, the 'wing' (parent) might include (as children) an 'inner wing' and an 'outer wing'. A ZoneElementVersion is a specialization of BreakdownElementVersion that identifies a version of a ZoneElement. An engineer defines an inspection task on a breakdown element 'Upper rudder' that is part of a zonal breakdown of an aircraft. The engineer identifies the corresponding view of the breakdown element.