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UML and Data Modeling: A Reconciliation by David Hay

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The progression from Chen to Barker-Ellis to Object Role Modeling is one from an initial conceptualization of relational principles to the establishment of semantic structures for a business. Information Engineering introduced an approach to developing systems that was more focused on the business environment where they were to be implemented. The symbols for cardinality and optionality were also more developed. Richard Barker and Harry Ellis simplified the notation and made the relationship names more rigorous. ORM made modeling more mathematically rigorous. This turns the model into a set of descriptions of very specific assertions about the nature of the business. It is this set of assertions that can then be presented to the business community ...

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