The Data Base Task Group (DBTG) was a working group founded in 1965 (initially named the ''List Processing Task Force'' and later renamed to DBTG in 1967) by the ''Cobol Committee'', formerly ''Programming Language Committee'', of the ''Conference of 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 ...
). The DBTG was chaired by
William Olle of
RCA
The RCA Corporation was a major American electronics company, which was founded as the Radio Corporation of America in 1919. It was initially a patent pool, patent trust owned by General Electric (GE), Westinghouse Electric Corporation, Westin ...
.
[
]
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. 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
The word schema comes from the Greek word ('), which means ''shape'', or more generally, ''plan''. The plural is ('). In English, both ''schemas'' and ''schemata'' are used as plural forms.
Schema may refer to:
Science and technology
* SCHEMA ...
and
subschema.
Sources
*Gunter Schlageter, Wolffried Stucky: ''Datenbanksysteme: Konzepte und Modelle'', B. G. Teubner Stuttgart, 1983,
References
History of software
COBOL
Data modeling languages
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