Aggregation in a Behavior Oriented
نویسندگان
چکیده
T ROLL is a language to specify information systems with dynamic behavior. Here, we elaborate on the speciication of object aggregation in T ROLL. We distinguish between two kinds of aggregation, static and dynamic aggregation. Static aggregation means that the composition of objects is described using predicates over constant properties. Dynamic aggregation means that we may alter the composition of objects by invoking special operations (events) that are implicitly deened for each dynamic complex object. Additionally, we describe the speciication of disjoint complex as a means for structuring a speciication. We introduce language features to describe object aggregation and give some hints towards their semantics.
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