Work with DDL statements and with DDL files.

Generically, DDL means “data definition language,” which refers to syntax for defining data structures. SQL provides a set of statements for this purpose, and they are known collectively as SQL DDL. A DDL file is a text file that contains a series of these statements.

The special variable $SYSTEM is bound to the %SYSTEM package. This means that (for ObjectScript) instead of ##class(%SYSTEM.class).method(), you can use $SYSTEM.class.method().