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<p><b>New page</b></p><div>{{Short description|Computing industry working group}}<br />
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]]). It was initially named the ''List Processing Task Force'' and later renamed to DBTG in 1967. The DBTG was chaired by [[T. William Olle|William Olle]] of [[RCA]].<ref><br />
{{cite book<br />
|title=The History and Heritage of Scientific and Technological Information Systems<br />
|quote=The DBTG was chaired by William Olle of RCA<br />
|author=W Boyd Rayward; Mary Ellen Bowden<br />
|date=2002}}</ref><br />
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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 model|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 [[Database schema|schema]] and [[subschema]].<br />
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==External links==<br />
*{{cite web |last1=Metaxides |first1=A. | display-authors=etal |title=Data base task group report to the CODASYL programming language committee, April 1971 |url=https://dl.acm.org/doi/pdf/10.1145/1387569 |website=ACM |publisher=Association for Computing Machinery |doi=10.1145/1387569 |doi-broken-date=2024-11-20 |access-date=September 10, 2023}}<br />
*{{cite book |title=CODASYL COBOL journal of development 1968 |date=1969 |publisher=National Bureau of Standards |location=Gaithersburg, MD |url=https://nvlpubs.nist.gov/nistpubs/Legacy/hb/nbshandbook106.pdf |access-date=September 10, 2023}}<br />
*{{cite book |title=CODASYL data description language: journal of development, June 1973 |date=1974 |publisher=National Bureau of Standards |location=Gaithersburg, MD |url=https://nvlpubs.nist.gov/nistpubs/Legacy/hb/nbshandbook113.pdf |access-date=September 10, 2023}}<br />
*{{cite web |last1=Sibley |first1=Edgar H. |title=The CODASYL data base approach: a COBOL example of Design and Use of a Personnel File |url=https://www.govinfo.gov/content/pkg/GOVPUB-C13-0d0d086477e125cd1920a974d2282571/pdf/GOVPUB-C13-0d0d086477e125cd1920a974d2282571.pdf |website=Govinfo | date=February 1974 |access-date=September 10, 2023}}<br />
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==References==<br />
{{Reflist}}<br />
*Gunter Schlageter, Wolffried Stucky: ''Datenbanksysteme: Konzepte und Modelle'', B. G. Teubner Stuttgart, 1983, {{ISBN|3-519-12339-8}}<br />
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[[Category:History of software]]<br />
[[Category:COBOL]]<br />
[[Category:Data modeling languages]]<br />
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