Issue 15251: Guard of activity edge should be optional (uml2-rtf)
Source:  (, )
Nature: Revision
Severity: Significant
Summary: The standard specifies the guard of an activity edge like this:


guard : ValueSpecification [1..1] = true


Hence it is required that every activity edge has a guard. This should be changed to [0..1] to make the guard optional.
The standard should also say that if a guard is not present it means the same as a "true" guard.

Note that the guard of a state machine transition is optional, so this change will make things more consistent
Resolution: 
Revised Text: 
Actions taken:
May 6, 2010: received issue
Discussion: 

End of Annotations:=====

m: webmaster@omg.org
Date: 06 May 2010 05:09:49 -0400
To: <issues@omg.org>
Subject: Issue/Bug Report


*******************************************************************************
Name:          Mattias Mohlin
Company:       IBM
mailFrom:      mattias.mohlin@se.ibm.com
Notification:  Yes
Specification: OMG Unified Modeling Language (OMG UML), Superstructure
Section:       12.3.5 ActivityEdge
FormalNumber:  formal/2009-02-02
Version:       2.2
RevisionDate:  02/02/09
Page:          325
Title:         Guard of activity edge should be optional
Nature:        Revision
Severity:      Significant
test:          3qw8
B1:            Report Issue


Description:


The standard specifies the guard of an activity edge like this:


guard : ValueSpecification [1..1] = true


Hence it is required that every activity edge has a guard. This should be changed to [0..1] to make the guard optional.
The standard should also say that if a guard is not present it means the same as a "true" guard.

Note that the guard of a state machine transition is optional, so this change will make things more consistent.