Using Meta-model-driven V Iews to Address Scalabilit

ActorsOnlyRule(v:ACViewClass) ::= §o:ObjectClass· o∈v ∧o∈find_all_abstract_actors () Query22 find_all_abstract_actors()::= §a:SpecifiedActorElementClass· (a in AbstractActorElementClass) 5.2.5 Plain-Actors-Only view Informal description A Plain-Actors-Only view presents plain actors, their direct specified actors, and the “specifies” links that connect them. master-thesis-v4.4.doc 93/231 9/1/2004 Example Figure 5.2-5 shows the corresponding Plain-Actors-Only view of the original AC view. We can see that all specified actors have disappeared—except the one that initiates the “specifies” link. Given our external relationship inheritance rule, we need to specify just one direct specified actor for each plain actor. Therefore, this view normally contains only (2*number of plain actors) actor elements. Figure 5.2-5 Plain-Actors-Only view derived from the original AC view