EAI — Redundant "database" association for an EAIDBTransformer

Document: UML Profile and Interchange Models for EAI
Section: 6.4.1.5 (EAIDBTransformer)

Description:
According to Figure 6-18 in Section 6.3.10.1, any EAIPrimitiveOperator may already have any number of associated EAIResources. Since EAIDBTransformer is a descendant of EAIPrimitiveOperator (via EAITransformer), and EAIDatabase is a child of EAIResource, it is not necessary to have a specific additional association from EAIDBTransformer to EAIDatabase. In fact, having the specific association hides the fact that an EAIDatabase is really just in the role of one of the resources of the EAIDBTransformer operator (which may be important to a tool which is managing the general allocation of resources to operators).

Recommendation:
Remove the "database" association from Figure 6-30. Instead, add a constraint that "An EAIDBTransformer has exactly one resource, which is an EAIDatabase", with corresponding OCL:

(self.resources->size() = 1) and (self.resources.oclIsKindOf(EAIDatabase))

see above