<language, database> (DDL) 1. A language enabling the structure
and instances of a database to be defined in a human-, and
machine-readable form. SQL contains DDL commands that can be
used either interactively, or within programming language source
code, to define databases and their components, e.g. CREATE and
DROP. See also Data manipulation language (DML). 2. A
specification language for databases, based on the entity-
relationship model. It is used in the Eli compiler-compiler to
manage type definitions. ["DDL Reference Manual", ECE Dept U
Colorado, 1991]. Try this search on Wikipedia, OneLook, Google
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