BPMN2 — Allow referencing scripts instead of enfocing inline specification

Use Case: When using BPMN 2.0 in systems management environments many tasks will be implemented as scripts. Especially, a huge amount of scripts already exist in these environments and BPMN 2.0 should support an easy and straightforward way to allow making use of them as script activity implementations.

Issue: Scripts to be performed must be copied to the already defined @script attribute to make it inline to the script task. In practice, this is not only redundant but also introduces a lot of potential consistency problems because the proper script might be subject to change; in that case, all copies in all script tasks must be found and adapted accordingly.

Prososed resolution: Add a new attribute @scriptRef (of type URI or QName) to the scriptTask element. This allows to point to the script to be executed.

Minor comments: There is no need to introduce the script separately as an operation of some (artificial) interface. This should be clarified.

The script task refers to a NONE task which has been renamed into Abstract Task: needs to be fixed.

An associated document (BPMN Script Invocation.DOCX) with more background has been sent to Tammo van Lessen

The functionality proposed is provided by other means.
Disposition: Closed, No Change