Working with File Manager
- File Manager overview
- Getting started with File Manager
- Viewing and changing data sets
  To view data stored in a supported data set, use the View Utility or the Edit Utility.
- Creating and editing templates
  For many tasks performed with File Manager, you can manipulate your view of a data set by applying a template.
- Working with the Template List
  Display a list of templates and perform actions on them.
- Filtering records with templates
- Managing data sets
- Using File Manager utilities
- Tape Specific Functions
- Disk/VSAM Data Functions
- OAM Functions
- Using UNIX™ System Services and the Hierarchical File System
- Introduction to programming with File Manager functions
- Enhancing File Manager processing
  You can enhance normal processing of a number of File Manager tasks by supplying a procedure that runs in conjunction with the File Manager process.
- Redefines criteria
  Redefines criteria can be specified for a field with a REDEFINES clause, or a field that is the target of a REDEFINES clause.
- Enhanced ISPF: Reference List, Search, Change, and PDSE Workbench
  File Manager provides several enhancements to the basic facilities that are available in an ISPF session: Enhanced Reference List, Enhanced Search, Enhanced Change, and PDSE Workbench.
- File Manager Service Provider for z/OS® Connect Enterprise Edition
  File Manager Service Provider for IBM® z/OS® Connect Enterprise Edition enables client applications to access IBM Z data sources using z/OS Connect.
- Function and panel reference lists

Selecting records with templates

When working with a data set in a panel or function, you can use a template to select the specific records that you want to use. You can specify two levels of criteria to select the records you want to process.

Record identification criteria: This identifies the unique characteristics of a record type, enabling File Manager to distinguish it from other types of record in the same data set. By default, if you do not specify these criteria, File Manager uses record length to identify a record type.
If the length of a record matches more than one record definition in the template, and no further record identification criteria are specified, File Manager uses the first matching record type in the template to display all records.
Record selection criteria: After a record has been identified as belonging to a particular type, you can narrow down which records of that type you want to process by specifying record selection criteria.

You specify record identification criteria and record selection criteria using comparison expressions. When you specify criteria, you should be aware of the potential for incurring processing overheads as a result of invoking REXX to resolve the criteria expressions.

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