The Free On-line Dictionary of Computing (30 December 2018):
Conference On DAta SYstems Languages
(CODASYL) A consortium that developed database models and
standard database extensions for COBOL.
CODASYL was formed in 1959 to guide the development of a
standardprogramming language that could be used on many
computers. Members came from industry and government data
processing departments. Its goal was to promote more effective
data systems analysis, design and implementation. It published
specifications for various languages over the years, handing these
over to official standards bodies (ISO, ANSI or their
predecessors) for formal standardisation.
The 1965 List Processing Task Force worked on the IDS/I database
extension. It later renamed itself to the Data Base Task Group
(DBTG) and publishing the Codasyl Data Model, the first to allow
one-to-many relations. This work also introduced data
definition languages (DDLs) to define the database schema and a
data manipulation language (DML) to be embedded in COBOL
programs to request and update data in the database.
Interest in CODASYL declined with the rise of relational
databases beginning in the early 1980s.