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E-R

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E-R vs. UML Class diagrams: What is the External/Internal Identifier implying?

In the post “The only thing I miss from the ER language”, Jordi stated a difference between E-R diagrams and UML Class diagrams, that is, the support of external identifiers by E-R and internal identifiers by UML, for identifying an instance of a type/class. I think it maybe appear as a little difference but, in … Continue reading

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