Template: ClassCode

This section specifies the template ClassCode.

The specification comprises a SysML Block that represents the template and an associated Parametric Diagram that defines the templates and PLCS PSMTemplate objects instantiated by the ClassCode template.

The specification comprises the following sections:

Section Description provides a description of the template;
Section Template Block specifies the SysML Block that represents the template;
Section Template Properties specifies the properties, i.e. the SysML Part, Reference and Value properties of the templates SysML Block;
Section Template Output Ports specifies the SysML Output Ports of the templates SysML Block. These bind to the templates and PLCS PSM objects instantiated by the ClassCode template as described in section Template Parametric Diagram;
Section Template Constraints specifies the constraints on PLCS PSMTemplate objects instantiated by the ClassCode template;
Section Template Parametric Diagram specifies the templates and PLCS PSMTemplate objects instantiated by the ClassCode template;
Section Instantiated blocks specifies the templates and PLCS PSMTemplate objects instantiated by the ClassCode template and bound to private parts of the template;
Section Default instances species the instances that have been instantiated in the template. These are used to set the default value of blocks.
Section Constraint blocks identifies the constraint blocks that have been specified in this template;
Section Example data provides example XML data sets that have been instantiated in accordance with this template.

NOTE An explanation of a template and its specification is provided in the Template overview

Description

The ClassCode template describes how to represent a Code that is to be used as a Class.

NOTE The use of Codes is described in Codes.

The SysML Block Definition diagram in Figure 1 shows how classification is represented in the PLCS PSM.

../../../../../data/PLCS/psm_model/images/SysML_Block_Definition_Diagram__Diagrams__Classification.png

Figure 1 - Classification model

Related Templates

The following templates are related to the ClassCode template:

IndividualCode (OASIS)
The IndividualCode specifies how to use a Code to that represents an Individual.

NOTE The ClassCode template may make reference to other templates as part of the Parametric Diagram. These are not listed here.

Template Block

Figure 2 shows the SysML Block that represents the template. The Block is an abstraction representing a pattern of templates and PLCS PSMTemplate objects.

The properties, i.e. the SysML Block Part, Reference and Value properties, of the template's SysML Block are described in the Template Properties section.

The output ports shown on the template's SysML Block are described in the template output ports section.

The SysML Parametric diagrams for the template Block are shown in template parametric diagram section.

Figure 2 - Template block definition diagram for ClassCode

Template Properties

The following SysML Part, Reference, and Value properties are defined for this template:

References:

codeContext [1] (Template: OASIS:Organization)

The organization that is responsible for defining the code.

codeSource [0..1] (Template: OASIS:Document)

The document in which the code is defined.

subClassOf [0..1] (Block: Ap239Ap233Psm:ExternalOwlClass)

The OWL class of which the Class represented by code is a subset.

The following constraint, normally a uniqueness constraint, is applicable when instantiating the ExternalOwlClass:

rule.Ap239Ap233Psm.ExternalOwlClass.ur1

Constraint: ur1

Specification: (OCL2.0)

ExternalOwlClass::allInstances()->isUnique(class)

The reference data used in Block: Ap239Ap233Psm:ExternalOwlClass is restricted as follows:

RDL constraint 1:

The reference data for:

OASIS:ClassCode.subClassOf -> ExternalOwlClass.class

is restricted to the following class or a subclass:

http://docs.oasis-open.org/plcs/ns/plcslib/v1.0/data/plcs/plcs-psm/refdata/plcs-psm#PlcsThing

typeOfCode [0..1] (Block: Ap239Ap233Psm:ExternalOwlClass)

The OWL class that defines the set of code identifiers of which this code is a member

The following constraint, normally a uniqueness constraint, is applicable when instantiating the ExternalOwlClass:

rule.Ap239Ap233Psm.ExternalOwlClass.ur1

Constraint: ur1

Specification: (OCL2.0)

ExternalOwlClass::allInstances()->isUnique(class)

The reference data used in Block: Ap239Ap233Psm:ExternalOwlClass is restricted as follows:

RDL constraint 1:

The code identifier.

The reference data for:

OASIS:ClassCode.typeOfCode -> ExternalOwlClass.class

is restricted to the following class or a subclass:

http://docs.oasis-open.org/plcs/ns/plcslib/v1.0/data/contexts/OASIS/refdata/plcs-rdl#External_item_identification_code

Values:

code [1] (Block: Ap239Ap233Psm:IdentifierString)

A string representing the code.

Template Output Ports

The following output ports are defined for this template:

class (Block: Ap239Ap233Psm:ExternalClass)

Enables the Block: Ap239Ap233Psm:ExternalClass instantiated by this template to be referenced when the template is used.

Template constraints

There are no constraints defined for this template.

Template Parametric diagram

This section describes the template's Parametric Diagram. The diagram details the pattern of templates and PLCS PSMTemplate objects that are required to represent the template ClassCode.

The public properties, i.e. those visible in the template's SysML block (See Figure 2) are shown on the left of a Parametric Diagram.

NOTE Restrictions on the reference data to be set on the public properties is defined in the Template Properties section.

The output ports are shown on the right of a Parametric Diagram.

PLCS PSM objects are shaded khaki and Templates are shaded light green in a Parametric Diagram.

Figure 3 - Parametric diagram for ClassCode

Instantiated Blocks

The following blocks are instantiated by this template and bound to private parts of the template as shown in the Parametric Diagram section:

Private Part Property:identification [1] (Template: OASIS:Identification)

Private Part Property:externalClass [1] (Block: Ap239Ap233Psm:ExternalClass)

The following constraint, normally a uniqueness constraint, is applicable when instantiating the ExternalClass:

rule.Ap239Ap233Psm.ExternalOwlClass.ur1

Constraint: ur1

Specification: (OCL2.0)

ExternalClass::allInstances()->isUnique(Sequence{id, source})

Private Part Property:subSet [1] (Block: Ap239Ap233Psm:SubsetMember)

Default instances

Figure 3 shows the instances that have been instantiated in the template. These are used to set the default value of blocks.

Figure 3 - Model instance diagram for ClassCode

Instances

The following instances have been created:

External_class_identification_code instance of Block: Ap239Ap233Psm:ExternalOwlClass.

ExternalOwlClass.class = http://docs.oasis-open.org/plcs/ns/plcslib/v1.0/data/contexts/OASIS/refdata/plcs-rdl#External_class_identification_code

The OWL class defining that the identifier is a code that identifies an ExternalClass

classPlcsThing instance of Block: Ap239Ap233Psm:ExternalOwlClass.

ExternalOwlClass.class = http://docs.oasis-open.org/plcs/ns/plcslib/v1.0/data/plcs/plcs-psm/refdata/plcs-psm#PlcsThing

The OWL class of which the ExternClass is a sub class.

Constraint Blocks

Figure 3 shows the constraint blocks that have been created in the template.

Constraint Blocks are typically used to combine blocks into a collection that can then be bound to a property. For example, combining a set of identifications that can then be bound to property of type Identification.

Figure 3 - Constraint block diagram for ClassCode

The following constraint blocks have been created:

Constraint: CodeOrOwlClass

Specification: (OCL2.0)

classSelect = if not externalClass.oclIsUndefined() then externalClass else owlClass endif

The constraint block that is used to allow the selection of either a ExternalClass or ExternalOwlClass. The constraint block is typically used within a template that supports the use of OWL or Codes to represent classes

Example data

No example data sets have been provided for this Template.