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Introduction Schema DDL
54 U929-J-Z125-9-76
Realm Named physical subdivision of the database. Management unit for data privacy and
security as well as for handling concurrent accesses.
The language elements of the DDL which are used to define the data units are described
on page 55 through page 70.
The notational convention are explained on page 22, and the general syntax rules are
summarized on page 233.
You compile the Schema DDL with the DDL compiler. For information on operating the DDL
compiler, please refer to the “Creation and Restructuring” manual, Compiling the Schema
DDL).