Issue 14679: Contradiction in constraint for Start Events in Event Subprocess (bpmn2-ftf)
Source: International Business Machines (Ms. Suzette Samoojh, ssamoojh(at)ca.ibm.com)
Nature: Revision
Severity: Minor
Summary: Apparent contradiction, assuming I'm reading the constraint right.

The spec states that "An Event Sub-Process MUST have a single Start Event".  I interpret this to mean exactly one.
And yet the spec allows a Start Event with a Multiple or Parallel Multiple event definition.  These are short-hand for multiple Start Events, each with a single event definition.  Hence a contradiction in functionality and intent.

Recommend updating the spec constraint to state "An Event Sub-Process MUST have at least one Start Event".


Resolution: This is not a problem with the specification, so we close with no change
Disposition: Closed, No Change
Revised Text: 
Actions taken:
November 19, 2009: received issue
October 21, 2010: closed issue
Discussion: 

End of Annotations:=====
s is issue # 14679

[OMG 14679] Contradiction in constraint for Start Events in Event Subprocess

##Source: IBM (Suzette Samoojh, ssamoojh@ca.ibm.com)
##Original Issue: http://www.osoa.org/jira/browse/BPMN-554
##Original Info: (Severity: Minor - Nature: Revision)

Apparent contradiction, assuming I'm reading the constraint right.

The spec states that "An Event Sub-Process MUST have a single Start Event".  I interpret this to mean exactly one.
And yet the spec allows a Start Event with a Multiple or Parallel Multiple event definition.  These are short-hand for multiple Start Events, each with a single event definition.  Hence a contradiction in functionality and intent.

Recommend updating the spec constraint to state "An Event Sub-Process MUST have at least one Start Event".