TheData Base Task Group (DBTG) was a working group founded in 1965 by theCobol Committee, formerlyProgramming Language Committee, of theConference on Data Systems Language (CODASYL). It was initially named theList Processing Task Force and later renamed to DBTG in 1967. The DBTG was chaired byWilliam Olle ofRCA.[1]
In April 1971, the DBTG published a report containing specifications of aData Manipulation Language (DML) and aData Definition Language (DDL) for standardization ofnetwork 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 ofschema andsubschema.
^W Boyd Rayward; Mary Ellen Bowden (2002).The History and Heritage of Scientific and Technological Information Systems.The DBTG was chaired by William Olle of RCA{{cite book}}: CS1 maint: multiple names: authors list (link)
Gunter Schlageter, Wolffried Stucky:Datenbanksysteme: Konzepte und Modelle, B. G. Teubner Stuttgart, 1983,ISBN3-519-12339-8
