[1] ISO 10303-239 Industrial automation systems and integration -mdash-- Product data representation and exchange -mdash-- Part 239: Application protocol: Product life cycle support 2005
[2] ISO 10303-11 Industrial automation systems and integration -mdash-- Product data representation and exchange -mdash-- Part 11: Description methods: The EXPRESS language reference manual 2004
[3] ISO 10303-21 Industrial automation systems and integration -mdash-- Product data representation and exchange -mdash-- Part 21: Implementation methods: Clear text encoding of the exchange structure 2002
[4] ISO 10303-28 Industrial automation systems and integration -mdash-- Product data representation and exchange -mdash-- Part 28: Implementation methods: XML representations of EXPRESS schemas and data 2003
