Physical Data Model

Definition:

A data model that is the instantiation of meaning, relationships and data attributes into a physical implementation automated by technology.

Commentary:

The physical data model is the physical implementation of the logical data model.

Ideally the physical data model is based on the logical data attributes, however that is not required for a physical model to exist.

Sometimes the physical data model has data elements different or in addition to the logical data model. This may be due to decomposition of a compound element or administrative elements required for physical implementation.