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Data Model Patterns: Conventions of Thought David C. Hay
Publisher: Dorset House Publishing Company, Incorporated

Subset is Analysis Model but that book is dated. This is a "data modeling question" in general. Hay is a must read book for anyone even remotely involved in the fine art of data modelling. 2: A Library of Data Models for Specific Industries · The Data Model Resource Book: Universal Patterns for Data Modeling (Vol. Data Model Patterns is an excellent data modeling book by David C Hay. The book 'Data Model Patterns – Conventions of thought' by David C. Hay, David (1995), Data Model Patterns: Conventions of Thought, Dorset House, New York, NY, ISBN 0932633293. Note that attributes of CONTACT are “Start date” and “End date”. Technorati Tags: Data Model,Patterns,ERP,Database Design. By modeling the rules as database constraints, we realize many advantages over other approaches (e.g., enforcing rules in the application layer). You'll want to 5 stars Data Modelling February 21, 2008 - 9am UTC "Data Model Patterns: Conventions of Thought" by David Hay, for a text based on real world examples.