1. EXPRESS/UML aka Part 25 Edition 2 Bath STEP July 2004

2. Agenda Update on EXPRESS/UML implementations Discuss draft NWI for Part 25 Edition 2 Relationship of STEP and OMG MDA/UML Plan next actions

3. Implementation IAI IFC team implementing David Price implementing –Now enough coverage to publish ISO 15926- 2 as UML on EXPRESS for Free (exff.org) Used in OMG PLM Services Spec recently adopted Others?

4. NWI Discussion Starter(1) Part 25 E1 is one-way EXPRESS Edition 1 to UML 1.5 –designed to support STEP implementation using UML-based software engineering tools –resulting UML is not tagged as being from EXPRESS Proposing that Part 25 Edition 2 do the following –stay based on UML 1.5 –extend the current mapping to cover EXPRESS Edition 2 –add new capability to represent EXPRESS Edition 2 constructs annotated as EXPRESS In OMG terms, this is a "UML Profile for EXPRESS". –extend use of Object Constraint Language where straightforward Not expecting to include complete support for all of EXPRESS expressions

5. NWI Discussion Starter(2) Part 25 Edition 2 scenarios –continue to support Edition 1 usage : STEP implementation using UML-based software engineering tools –support EXPRESS and UML constructs on the same UML diagram –enable the use of UML tools to create EXPRESS schemas in a manner similar to the way EXPRESS-G tools are used today –enable the use of UML in the specification of a complete software system that includes EXPRESS constructs and the use of EXPRESS in the context of the OMG Model Driven Architecture

6. NWI Discussion Starter(3) Technical approach expectations –UML Stereotypes and Tagged Values, not extensions to UML itself, will be used to define this aspect of Part 25 Edition 2 UML 2 and MOF 2 are not yet finalized or commercially available in UML tools so, Part 25 Edition 2 is focused on UML 1.5. Suggesting Part 25 Edition 3 will be required to address UML2 and MOF 2 in 2005

7. After Change Management Review Publication approach –Publish technically complete Edition 1 as-is today –Defer remaining editorial comments to Edition 2 –Submit Edition 2 NWI ASAP Publish working draft in September Walkthough at Seattle in October Submit for CD TS ballot December Walkthrough in Lillehammer and discuss early ballot comments Ballot resolution workshop April/May 2005 TS publication May/June 2005 –Edition 3 work on UML 2 can begin informally in November/December once OMG Final Spec is available –NWI for Edition 3 as soon as major technical work on Edition 2 complete

8. OMG/STEP and EXPRESS/UML MDA Overview OMG PLM Enabler work presentation