UML22 — Property 7.3.44 p125

"A property related to a classifier by ownedAttribute represents an attribute..."
and in its semantics
"When a property is owned by a classifier other than an association via ownedAttribute, then it represents an attribute of
the class or data type."

However, in the case of "StructuredClassifier", "Signal", "Artifact",
"Interface".
"attribute" is not necessary

The specification should modified as followings.

p125 L7:
"A property related to a classifier by attribute represents an attribute,"

and

p128 L17
"When a property is owned by a classifier other than an association, then it represents an attribute of the classifier."

The issue is not correct. All attributes are in fact owned via a property called ownedAttribute, different in each case,
but this is true for all subclasses of Classifier including Interface, Signal, Artifact, etc. So the text is correct.
Disposition: Closed - No Change