Working with Z Data Tools
- Z Data Tools overview
- Getting started with Z Data Tools
- 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 Z Data Tools, 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 Z Data Tools utilities
- Tape Specific Functions
- Disk/VSAM Data Functions
- OAM Functions
- Using UNIX™ System Services and the Hierarchical File System
- Introduction to programming with Z Data Tools functions
- Enhancing Z Data Tools processing
  You can enhance normal processing of a number of Z Data Tools tasks by supplying a procedure that runs in conjunction with the Z Data Tools process.
  - Why enhance Z Data Tools 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 Z Data Tools 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 Z Data Tools 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
  Z Data Tools provides several enhancements to the basic facilities that are available in an ISPF session: Enhanced Reference List, Enhanced Search, Enhanced Change, and PDSE Workbench.
- Z Data Tools Service Provider for z/OS® Connect Enterprise Edition
  Z Data Tools 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

Supplying a procedure when invoking Z Data Tools from a REXX program

You can specify a PROC parameter to enhance Z Data Tools processing even when you are invoking the Z Data Tools function from a REXX program.

To use a procedure stored in a member of a PDS:

Allocate an HFMEXEC DD that identifies a PDS where your saved procedures reside.
Code PROC=member-name in the Z Data Tools function invocation.

For example, to use the procedure stored in USERID.HFMEXEC(TOTALS):

/* REXX program to print a data set, with enhanced processing */
/* as defined in the "nested" REXX procedure named TOTALS     */
"ALLOC DD(HFMEXEC) DSN('USERID.HFMEXEC') SHR"
⋮
HFMMAIN "$DSP DSNIN='HFMUSER.TEST.KSDS1',PROC=TOTALS"
⋮
"FREE DD(HFMEXEC)"

Note: The TSO commands ALLOC and FREE can also be issued outside the REXX program.

To enter a procedure from the terminal

Code PROC=* in the Z Data Tools function invocation.
When you run the REXX program and it invokes the Z Data Tools function, Z Data Tools prompts you to enter procedure statements with the following messages:
```
SYSIN DD is allocated to terminal
Enter card input (EOD=NULL REPLY):
```
Type your procedure statements, pressing the Enter key at the end of each line.
Enter /+ as the last line to complete the procedure and indicate end of data. Z Data Tools then runs the requested function using the entered procedure.