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Chapter 2 Data Models - Cleveland State University
cis.csuohio.eduJan 29, 2014 · Data Model Basic Building Blocks Entity: Unique and distinct object used to collect and store data ... replaced standard transmission databases Based on a relation Relation or table: Matrix composed of intersecting ... Abstraction of real-world entity Attributes - Describe the properties of an object 25
Data Modeling and Data Models The Importance of Data …
media.lanecc.edu• OODM (object-oriented data model) is the basis for OO-DBMS (Semantic data model) • An object is described by its factual content: –Are self-contained: a basic building-block for autonomous structures –Is an abstraction of a real-world entity –Contains information about relationships between facts within the object and with other ...