The Data Base Task Group (DBTG) was a working group founded in 1965 by the ''Cobol Committee'', formerly ''Programming Language Committee'', of the ''Conference on Data Systems Language'' (

CODASYL CODASYL, the Conference/Committee on Data Systems Languages, was a consortium formed in 1959 to guide the development of a standard programming language that could be used on many computers. This effort led to the development of the programming ...

). It was initially named the ''List Processing Task Force'' and later renamed to DBTG in 1967. The DBTG was chaired by William Olle of

RCA RCA Corporation was a major American electronics company, which was founded in 1919 as the Radio Corporation of America. It was initially a patent pool, patent trust owned by General Electric (GE), Westinghouse Electric Corporation, Westinghou ...

. In April 1971, the DBTG published a report containing specifications of a ''Data Manipulation Language'' (DML) and a ''Data Definition Language'' (DDL) for standardization of

network database model In computing, the network model is a database model conceived as a flexible way of representing objects and their relationships. Its distinguishing feature is that the schema, viewed as a graph in which object types are nodes and relationship t ...

. The first DBTG proposals had already been published in 1969. The specification was subsequently modified and developed in various committees and published by other reports in 1973 and 1978. The specification is often referred to as the DBTG database model or the CODASYL database model. As well as the data model, many basic concepts of database terminology were introduced by this group, notably the concepts of

schema Schema may refer to: Science and technology * SCHEMA (bioinformatics), an algorithm used in protein engineering * Schema (genetic algorithms), a set of programs or bit strings that have some genotypic similarity * Schema.org, a web markup vocab ...

and subschema.

External links

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References

*Gunter Schlageter, Wolffried Stucky: ''Datenbanksysteme: Konzepte und Modelle'', B. G. Teubner Stuttgart, 1983, History of software COBOL Data modeling languages {{database-stub