Alternative Modeling Convetion / Implementing entities

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Last updated 8:48 PM on 6/14/26
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9 Terms

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Subject area

decompose a complex model into group of related entities called subject area

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Independent / Dependent

Refer to strong entities as independent and weak entiies as dependent

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Unified Modeling Language UML

commonly used for software development similar to database structures includes ER conventions

4
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IDEF1X

stands for information Definition version. became popular due to early adoption by US of defense

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Strong table

strong entity becomes strong table. PKEY must be unique and required and should be stable simple and meaningless

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Artifiical Key

system generated by database designer. usually integers and new rows are inserted to table

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weak table

a weak entity becomes a weak table

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supertype table

supertype entity becomes a supertype table

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subtype table

subtype entity becomes subtype table