Entity-Relationship modelling

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2 - Entity-Relationship modelling

The Entity-Relationship model, or ER model, of ADAMO is based on the one originally proposed by P. Chen. Its particular flavour results from the impositions of a compromise between modelling power, convenience of data manipulation from Fortran, and speed of execution.

2.1 - Data models

2.2 - The Entity-Relationship model

2.3 - Entity-Relationship diagrams

2.4 - Types of relationships

2.5 - A complete ER diagram

2.6 - Subschemas

2.7 - Mapping ESets to tables

2.8 - Many to many relationships

2.9 - Generalised relationships

2.10 - Summary

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BR and MR - CERN PTG - ADAMO Users Guide for Version 3.3 - 11 Oct 93