| Process type | semantics-based database description |
|---|---|
| Product(s) | Gellish (2005), ISO 15926-2 (2002) |
| Leading companies | U.S. Air Force as Integrated Computer-Aided Manufacturing program |
| Main facilities | Planning of Data Resources, Building of Shareable Databases, Evaluation of Vendor Software, Integration of Existing Databases |
| Year of invention | mid-1970s |
A semantic data model (SDM) is a high-level semantics-based database description and structuring formalism (database model) for databases. This database model is designed to capture more of the meaning of an application environment than is possible with contemporary database models. An SDM specification describes a database in terms of the kinds of entities that exist in the application environment, the classifications and groupings of those entities, and the structural interconnections among them. SDM provides a collection of high-level modeling primitives to capture the semantics of an application environment. By accommodating derived information in a database structural specification, SDM allows the same information to be viewed in several ways; this makes it possible to directly accommodate the variety of needs and processing requirements typically present in database applications. The design of the present SDM is based on our experience in using a preliminary version of it. SDM is designed to enhance the effectiveness and usability of database systems. An SDM database description can serve as a formal specification and documentation tool for a database; it can provide a basis for supporting a variety of powerful user interface facilities, it can serve as a conceptual database model in the database design process; and, it can be used as the database model for a new kind of database management system.
- ^ FIPS Publication 184 Archived 2013-12-03 at the Wayback Machine released of IDEF1X by the Computer Systems Laboratory of the National Institute of Standards and Technology (NIST). 21 December 1993.