1. ISO IS 10303–1 (1994) Industrial Automation Systems—Product Data Representation and Exchange - Part 1: Overview and Fundamental Principles ISO IS 10303–1, International Standard.
2. ISO IS 10303–11 (1994) Industrial Automation Systems—Product Data Representation and Exchange - Part 11: The EXPRESS Language Reference Manual ISO IS 10303–11, International Standard.
3. ISO-DIS 10303–213 (1995) Industrial Automation Systems—Product Data Representation and Exchange - Part 213: Numerical Control Process Plans for Machined Parts ISO Document ISO DIS 110303–213, Draft International Standard.
4. ISO CD 10303–224 (1995) Industrial Automation Systems—Product Data Representation and Exchange - Part 224: Mechanical Product Definition for Process Planning using Machining Features, ISO Document ISO CD 10303–224, Committee Draft.
5. Bloom, B. H. (1989) “Deriving a PDES context-driven integrated model from topical models.” Proceedings of Autofact, 7/13–7/29.