AUTOIDMS automatically creates Master Files and Access Files for the CA-IDMS network and LRF records, based on information stored in the IDMS Integrated Data Dictionary and user selections.

AUTOIDMS requires disk space to write the new file descriptions (and parameter log file, if applicable) to the z/OS data sets specified on the initial input screen. In addition, sufficient disk space must be available for temporary work files created. The amount of temporary space depends on the size of the subschema being described.

The Master Files IDMSIDD and AUTOIDMS must be members in the sequence of data sets assigned to the DDNAME MASTER. The IDMSIDD Access File must be a member in the sequence of data sets assigned to the DDNAME FOCIDMS. The AUTOIDMS FOCEXEC must be a member in the sequence of data sets assigned to the DDNAME FOCEXEC. These members should be located in the production FOCUS libraries at your site as a result of the adapter installation process.

When the IDMS record contains a repeating field, AUTOIDMS can create a separate child segment in the Master File, called an OCCURS segment, to describe the portion of the record containing the repeating field. For a repeating field with a fixed number of repetitions, you have a choice of creating separate fields in the same segment instead of an OCCURS segment. On the AUTOIDMS Main Menu, you can specify whether AUTOIDMS should create an OCCURS segment for repeating fields with a fixed number of occurrences, or whether the repetitions should be described as individual fields in the parent segment.

Before you begin, you should decide which record-types are appropriate for your Master File. Consider which record should be the root segment and which record/set relationships will be included as descendants. A review of the Entity Relationship diagram for the subschema will assist in these decisions. Since you can create several Master Files in the same AUTOIDMS session, with only one pass through the IDMS dictionary, you may want to prepare several views of the subschema before proceeding.