Index Definition Item

An index definition item defines an index structure. It contains both the English source and the compiled version for the selection and source criteria specified with DEFINE-INDEX. The item is created in the file dictionary by executing the DEFINE-INDEX command and is used by CREATE-INDEX to construct an index for a data section. Because it contains the compiled version of the selection and source criteria, the index definition reflects the data definitions in existence when DEFINE-INDEX was executed and does not reflect any subsequent changes made to them. See Indexing for details.

Item Format

Attribute	Description
Item-id	Index name - Used by CREATE-INDEX to reference the index definition and shown in the Data Level Description (attribute 4) when the index has been created.
001	I - Specifies an index definition.
002	English selection and sort criteria.
003	Compiled selection and sort criteria.