The application of a relational DBMS (database management system) to the development, generation, and operation of NATO's Northern European Command (NEC) Command, Control, Information System (CCIS) is discussed. The DBMS (Britton Lee's back-end processor IDM 500) is used both as a component of the deliverable application system and as a support tool for offline development work. An overview of the system data engineering methodology used in the project is presented together with the lessons learned in designing such a large complex data-intensive system. The DBMS, in supporting the application database, handles formatted text, graphics and message data. The data model for this database supports sixteen military operational disciplines (air operations, intelligence, weather, etc.).
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