UML22 — UML 2 Issue: AssociationEnd

PROBLEM STATEMENT
In UML 1 the navigability of an association end was specified by the
meta-attribute AssociationEnd.isNavigable. In UML 2 apparently this
meta-attribute dissapears, and AssociationEnd is substituted by Property. We
know whether an association end is navigable by the following rule: if the
property is owned by a class, it represents a navigable end; if the property
is owned by an association, it represents a non-navigable end (see
Superstructure, p. 89). However, references to old metaclass AssociationEnd
and old meta-attribute isNavigable still appear in the Spec in several
places and OCL expressions (AssociationEnd appears in: Infrastructure, p.
33; Superstructure, pp. 119, 245; isNavigable appears in: Superstructure, p.
245).

PROPOSED SOLUTION
Add derived meta-attribute /isNavigable to metaclass Property.
Eliminate references to AssociationEnd.

Discussion
This issue has already been resolved by, or no longer applies to, the UML 2.5 Beta 1 specification.
Disposition: Closed - No Change