In this paper, we describe the BLOOM metaclasses with regard to the Unified Modeling Language (UML) semantics. We concentrate essentially on the Generalization/Specialization and Aggregation/Decomposition dimensions. Because they are used to guide the inte­gration process BLOOM was intended for. Here we focus on conceptual data modeling constructs that UML offers. ln spite of UML provides much more abstractions than BLOOM, we will show that BLOOM still has some abstractions that, UML does not. For some of these abstractions, we will sketch how UML can be extended to deal with this semantics that BLOOM adds.

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