ISSUE-62 (actions in PRD): Which actions should PRD cover [PRD ]

ISSUE-62 (actions in PRD): Which actions should PRD cover [PRD ]

http://www.w3.org/2005/rules/wg/track/issues/

Raised by: Christian de Sainte Marie
On product: PRD 

- The basic actions in a production rule systems are ASSERT, RETRACT, MODIFY;
- Most implemented PR languages have also the possibility to execute some sort of externally specified code;
- In the non-normative PRR-OCL section, OMG PRR specifies five actions: assert, retract, update, assign and invoke.

What are action constructs should we specify in PRD?