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UML and Data Modeling: A Reconciliation by David Hay

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In 1995, your author published Data Model Patterns: Conventions of Thought,[88] a book describing a set of standard data models (in the Barker-Ellis notation) describing standard business situations. It began by describing people and organizations, along with their addresses and geographic locations. It further had models describing physical assets, contracts, and activities. More detailed models described process industries and material requirements planning.

The models were at a level of abstraction that made them robust and generally applicable, but they also were in a language anyone could follow. They were conceptual models, in that they were without regard for what database technology might be used to implement them.

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