Identifying VSAM records

You can identify records in data sets by key , by relative byte address (RBA) or extended relative byte address (XRBA) , or by relative record number (RRN).

The RIDFLD (record identification field) option on the CICS® file control commands identifies a field containing the record identification appropriate to the access method and the type of file being accessed. For most things you can do to a record (read, add, delete, or start a browse), you identify the record by specifying the RIDFLD option, except when you have read the record for update first. However, there is no RIDFLD for ENDBR, REWRITE, and UNLOCK commands.