UML14 — Parameters/Attributes need Specification Classifiers

Summary: AssociationEnds have onr type, but may have many specifiers. These specifiers limit the setof operations that may be used on the actual classifiers at that end. In several senses, attributes are parallel to AssociationEnds. Often they are freely diagrammed interchangeably. It appears that if an associationEnd is diagrammed as an attribute, the specifiers would be lost. This breaks the symmetry between associationEnds and attributes

considered and declined