Extended er model - PowerPoint PPT Presentation

Semantic Data Modeling Concepts

Semantic Data Modeling Concepts. Background: Semantic modeling research started in ‘70s (mainly late ‘70s) Originally as schema design aids/tools for traditional record-based models (eg, ER) Emphasis: to accurately model data relationships

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Data Modeling : ER Model…

Data Modeling : ER Model…. Lecture 07. Summary of last lecture. ER model notation Examples Ternary relationship Weak entities Extended ER Model Process Modeling. EXTENDED E-R MODEL. extensions to capture more meaning concepts of generalization, aggregation and sub-set hierarchies added

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943 views • 25 slides

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