Comparing Metamodels for ER, ORM and UML Data Models - Advanced Topics in Database Research - page 45

On the other hand, attribute-based approaches lead to more compact diagrams. By
using ORM for the initial conceptual analysis and validation with the domain expert, and
then transforming the ORM model to an attribute-based model such as an ER model or
UML class diagram, modelers can reap the benefi ts of both attribute-free and attribute-
based approaches.

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