< 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].
(1999-04-26)