Issue 12272: Section 7.3.44 (uml2-rtf)
Source: OFFIS e.V. (Mr. Christian Mrugalla, nobody)
Nature: Enhancement
Severity: Significant
Summary: The metaclasses 'Attribute' and 'AssociationEnd' (defined in UML 1.x) are merged in the metaclass 'Property' in UML 2.x. But the terms 'attribute' and 'association end' are still used in the standard, based one the two possible Property-containments (Property owned by a 'Class' respectively by an 'Association'). In addition, a semantic for the different values of the meta-property 'aggregation' is only defined for a 'Property' of style 'association end'. I propose to re-introduce the metaclasses 'Attribute' and 'AssociationEnd' as specializations of 'Property', making 'Property' an abstract class (the meta-property 'aggregation' should be then moved to AssociationEnd).

Resolution: 
Revised Text: 
Actions taken:
March 12, 2008: received issue
Discussion: 

End of Annotations:=====

m: webmaster@omg.org
Date: 12 Mar 2008 10:47:01 -0500
To: <issues@omg.org>
Subject: Issue/Bug Report



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Name: Christian Mrugalla
Company: OFFIS e.V.
mailFrom: christian.mrugalla@offis.de
Notification: Yes
Specification: OMG UML
Section: 7.3.44
FormalNumber: formal/2007-11-02
Version: 2.1.2
RevisionDate: 11/02/2007
Page: 123ff
Nature: Enhancement
Severity: Significant
HTTP User Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv:1.8.1.12) Gecko/20080201 Firefox/2.0.0.12
Description
The metaclasses 'Attribute' and 'AssociationEnd' (defined in UML 1.x) are merged in the metaclass 'Property' in UML 2.x. But the terms 'attribute' and 'association end' are still used in the standard, based one the two possible Property-containments (Property owned by a 'Class' respectively by an 'Association'). In addition, a semantic for the different values of the meta-property 'aggregation' is only defined for a 'Property' of style 'association end'. I propose to re-introduce the metaclasses 'Attribute' and 'AssociationEnd' as specializations of 'Property', making 'Property' an abstract class (the meta-property 'aggregation' should be then moved to AssociationEnd).