Category:Entity-relationship models
describes inter-related things of interest in a specific domain of knowledge;composed of entity types (which classify the things of interest) and specifies relationships that can exist between instances of those entity types | |||||
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Entity-Relationship Models (ERM) is an abstract conceptual representation of structured data. Entity-relationship modeling is a relational schema database modeling method, used in software engineering to produce a type of conceptual data model or semantic data model of a system, often a relational database, and its requirements in a top-down fashion. Diagrams created using this process are called entity-relationship diagrams, or ER diagrams or ERDs for short.
Originally proposed in 1976 by Peter Chen, many variants of the process have subsequently been devised.
See also:
Category:1970s diagrams Category:Block diagrams Category:Data modeling Category:Relationship diagrams Category:Charles BachmanPages in category "Category:Entity-relationship models"
- File:2-way-relation-with-arrow.svg
- File:3-way-ERD.png
- File:Scd model.png
- File:An example of entity relationship diagram in Hebrew.jpg
- File:An example of matrix processing for solving the problem.png
- File:CPT-Databases-Example1MLeagueTeam.svg
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- File:CPT-Databases-Exercise-MMStudentClass.svg
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- File:CPT-Databases-Exercise11.svg
- File:CPT-Databases-ManytoMany.svg
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- File:CPT-Databases-OnetoOne.svg
- File:Data model in ER.png
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- File:Ejemplo Diagrama E-R extendido.PNG
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- File:Entity Relation Modell Beispiel Analyse.png
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- File:Entity Relationship Diagram.jpg
- File:Entity Relationship metamodel.png
- File:Entity-Relationship Example Diagram (DE).png
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- File:Entity-Relationship-Modell Attribut Klassen.svg
- File:Entity-Relationship-Modell reguläre und schwache Entität.svg
- File:Entity-Relationship-Modell.svg
- File:ER diagram dutch 1.svg
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- File:ER diagram dutch getrouwdmet.png
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- File:ER Diagram MMORPG.png
- File:ER Diagram MMORPG.svg
- File:ERD-artist-performs-song.svg
- File:ERD-Attribute types.png
- File:Erd-attribute.png
- File:ERD-Crows-Foot Artist-Song.gif
- File:ERD-entity (product).png
- File:ERD-entity(product+id).png
- File:Erd-entity-relationship-example1 kr.png
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- File:Erd-entity-relationship-example1.svg
- File:Erd-entity-with-attribute.jpg
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- File:ERD-relation(order).png
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- File:Erd-relationship-with-attribute.jpg
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- File:Erd-relationship-with-attribute.svg
- File:EsempioER.jpeg
- File:Example ERD2.png
- File:Innovacion supra-entidad Productos.png
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- File:Luna-modeler-er-diagram.jpg
- File:Many to many relationship example.png
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- File:One to one relationship example.png
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- File:OpIndia ownership graph.svg
- File:Products supra-entity innovation.png
- File:Relationship between Angola, Dokolo, and Galp.svg
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- File:Skos metamodel.png
- File:Spezialisierg Generalisierg.png
- File:Spezialisierg und Generalisierg.svg
- File:Supra-entidad Productos.png
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- File:Supra-entity innovation.png
- File:Supra-entity Products.png
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- File:WADP Lua Tables ER Diagram.png
- File:WordPress file-reference ERD.svg
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- File:人物系カテゴリと見る場合1.jpg
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