instance specification
A description in a model of an instance or group of instances. The description may or may not describe all details of the instance.
Semantics
An instance specification is the description of an individual instance in the context of its participation in a system and its relationship to other instances. Unlike an instance, which exists as only as a concrete individual in an executing system, an instance specification can be more or less precise. At one extreme, it can describe a single object in a single execution of a system in full detail. More often, it describes some aspects of the run-time instance and omits others that are not of interest in a certain view. It can also represent multiple objects over many executions ...
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