The primary goal of the second edition was to track the new features added to the STEP CAD track by AP242, support digital twin manufacturing, and to integrate lessons learned from testing and production experience.
The latest long-form EXPRESS model for AP238e2 can be found in Annex I. These are the definitions that WG15 uses in testing and development.
The following is a general overview of the second edition activity
Finally, the documents below give specific changes for the
second edition that were identified during testing. Annex K
in the second edition gives a full listing of changes from the
first edition and the two whitepapers below were produced at
the start of the second edition effort to summarize findings
up to that point. Dave Loffredo is the editor of the first
and second editions and can be reached with specific questions