is sometimes incorrectly called a physical data model, which is not what the ANSI people had in mind. The physical design of a database involves deep use of particular database management technology. For example, a table/column design could be implemented on a collection of computers, located in different parts of the world. That is the domain of the physical model. Conceptual, logical and physical data models are very different in their objectives, goals and content. Key differences noted below. See also DODAF Core architecture data model Database design Entity-relationship model Database schema Object-role modeling FCO-IM References External links Building a Logical Data Model By George Tillmann, DBMS, June 1995. Data modeling