UML14 — Core package-backbone diagram

Summary: The "Core Package-Backbone" diagram shows, on the Association
between Classifer and StructuralFeature, that the "feature"
AssociationEnd is ordered. Ordering is neither wanted nor
feasible for this end. What ordering would be applied to the
set of Attributes that given Class or DataType types? The order
in which they are defined is the only conceivable ordering, which
doesn"t seem very valuable.

Clarified in UML 1.3.