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Action (from BasicActions ) on page 247
ReadExtentAction is an action that retrieves the current instances of a classifier.
No additional attributes
• classifier : Classifier [1..1] The classifier whose instances are to be retrieved.
Issue 8176 -add subsets constraint
• result : OutputPin [1..1] The runtime instances of the classifier. {Subsets Action::input}
[1] The type of the result output pin is the classifier.
[2] The multiplicity of the result output pin is 0..*.
self.result.multiplicity.is(0,#null)
The extent of a classifier is the set of all instances of a classifier that exist at any one time.
It is not generally practical to require that reading the extent produce all the instances of the classifier that exist in
the entire universe. Rather, an execution engine typically manages only a limited subset of the total set of instances of
any classifier and may manage multiple distributed extents for any one classifier. It is not formally specified which managed
extent is actually read by a ReadExtentAction .
No specific notation
ReadExtentAction is introduced to provide access to the runtime instances of a classifier.
ReadExtentAction is unchanged from UML 1.5.