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According to James

According to James Martinand James Odell,“anything is an object”. 22. Martin, J., and James Odell. 1995. Object-Oriented Methods.(Englewood Cliffs, NJ: Prentice Hall). p. 34.Copyright © 2012, Essential Strategies, Inc/71 30

• … is not just any “discrete entity with a well-defined boundaryand identity”.• .. is limited to what Richard Barker calls things or objects “ofsignificance, whether real or imagined, about which anorganization needs information.” 3• An “entity class”, unlike other “classes”, is not concerned withoperations, methods, or behavior.– Those belong to the world of “process modeling.”• An entity/relationship model is only concerned with theStructure of business data.3. Barker, Richard. 1990. CASE*Method: Entity Relationship Modeling. (Wokingham, England:Addison-Wesley).Copyright © 2012, Essential Strategies, Inc/71 31

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