Information Systems, Databases, and Models › Logical Models

Logical Models

There are three levels of logical models that are used to capture business information requirements: the Entity Relationship Diagram, the Key-Based Model, and the Fully-Attributed model. The Entity Relationship Diagram and the Key-Based models are also called area data models since they often cover a wide business area that is larger than the business chooses to address with a single automation project. In contrast, the Fully-Attributed model is a project data model since it typically describes a portion of an overall data structure intended for support by a single automation effort.