DDL is an acronym for Dictionary Definition Language The role of DDL is to define the components (data items) from which definitions may be constructed DDL2 provides the framework on which the mmCIF dictionary is based
DDL Data Definition Language A language used by a database management system which allows users to define the database, specifying data types, structures and constraints on the data Examples are the CREATE TABLE, CREATE INDEX, ALTER, and DROP statements Note: DDL statements will implicitly commit any outstanding transaction
Language describing the schema for a user database, data names and access paths, and their interrelationships