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Working with File Manager
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.
Creating and supplying a procedure

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.
  - Why enhance File Manager processing?
    Enhanced processing allows end users to easily perform tasks that would otherwise need to be done by skilled application programmers, and to concentrate on business results rather than data processing problems.
  - Which tasks can be enhanced
    You can supply a procedure with DFSORT or REXX statements to enhance normal File Manager processing according to your own requirements.
  - Choosing the right function to enhance
    With enhanced processing it can be unclear which function or panel to invoke for a particular task, and what combination of template, DFSORT and REXX (or FASTREXX) processing is best to use.
  - Creating and supplying a procedure
    - Procedure statement types
    - Choosing between FASTREXX, REXX, and DFSORT for your procedure
      In general, FASTREXX is the best compromise between performance and function.
    - Coding DFSORT procedure statements
    - Coding REXX procedure statements
    - Coding end of file procedure
    - Combining DFSORT and REXX statements in a procedure
    - Supplying a procedure to enhance File Manager processing
  - How enhanced processing works
  - REXX and DFSORT Examples
  - Examples of tasks that can be performed easily using FASTREXX
- 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

Creating and supplying a procedure

Your procedure, containing DFSORT or REXX statements or a combination of all of these, can be supplied as:

A temporary procedure, created as you process a relevant File Manager panel, or invoke a relevant File Manager function from a REXX program;
A saved procedure, nominated as you process a relevant File Manager panel or invoke a relevant File Manager function in batch or from a REXX program; or
An inline procedure, nested in a batch job stream, that invokes a relevant File Manager function.

Saved procedures must reside in a member of a fixed or variable format PDS. The record length of the data set is unrestricted, but must be at least large enough for complete tokens to be entered, with consideration given to the statement continuation requirements of DFSORT (as processed by File Manager, see below) and REXX. A record length of 80 meets these requirements comfortably. With this length, procedure statements can be copied into a temporary Edit session without truncation or used as an inline procedure in a JCL Edit session.

Whether a procedure is entered at the terminal, saved in a PDS, or supplied as an inline procedure in JCL, it must follow the rules described below for File Manager procedures, as well as the specific rules for DFSORT and REXX statements defined by the DFSORT and REXX products.