UML14 — Page 47: Dependency is a unidirectional, client-server

Summary: Page 47 Dependency is clearly a unidirectional, client-server relationship.
Usage, as a stereotype of Dependency, similar. But I don"t get the same
feel for Trace and, to a lesser degree, Refinement. Indeed, trace seems
to negate some of the properties of Dependency - a bad practice as
Brachman pointed out many years ago. For example, Trace has no
directionality yet it inherits unidirectionality from Dependency which it must
therefore cancel/negate.

Redundant with issue# 1227.