UML14 — Excessive syntactic and semantic overlap between structured Classifiers

There is excessive syntactic and semantic overlap between two
kinds of structured Classifiers: StructuredClasses::Classes and Components.
It is confusing to users how to choose between these constructs, and how to
apply them correctly. The confusion extends to how Ports and Interfaces are
used with these constructs, since it is unclear how to use both of these in
a complementary manner.
Recommendation: Remove one of these structured Classifiers, or clarify how
to choose between and apply them. Also explain how to apply Ports and
Interfaces in a complementary manner for both black-box and white-box views
of structured Classifiers.

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