Definitions for "IDEF"
A software methodology and diagramming system developed by the US Department of Defense and widely used by CASE vendors in the late Eighties. Some IDEF diagrams are still used for DOD projects today.
Integrated Definition Language
Stands for ICAM Definition Method or Integration Definition Method. IDEF is a modeling methodology developed by the U.S. Air Force to help programmers design complicated software systems. IDEF can be divided into five separate modeling methods: IDEF0 (Function Modeling), IDEF1X (Data Modeling), IDEF2 (Simulation Model Design), IDEF3 (Process Description Capture), and IDEF4 (Object-Oriented Design).