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Working with File Manager
Creating and editing templates
For many tasks performed with File Manager, you can manipulate your view of a data set by applying a template.
Template types and structure
A File Manager template is a collection of information that you can use to select and format records and fields in an application data set.
Data description support
Editing rules for PL/I varying length zero terminated string types

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.
  - Template types and structure
    A File Manager template is a collection of information that you can use to select and format records and fields in an application data set.
  - Template repository
    The template repository is a VSAM KSDS file that is used to associate a data set or resource name with its corresponding template.
  - Managing templates
  - Manipulating the display of fields in records
  - Managing templates with the Template Workbench
  - Specifying scrambling options
  - Mapping fields between templates
  - Copybook View and Print Utility
    Use the Copybook View and Print Utility to view or print field definition information.
  - XML templates
    A File Manager template can be exported to an external XML format using the Template Export utility.
- 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

Editing rules for PL/I varying length zero terminated string types

Character or Graphic data types with the PL/I VARYINGZ attribute (FM types ZC and Z2) are shown in the Edit panels with one or two display characters added to the end of the declared length. These screen positions contain X'00' or X'0000' when the current length of the string is equal to the maximum declared length. The extra positions are protected from data entry by File Manager.

The Edit processing rules for a VARYINGZ field are:

The position of the X'00' or X'0000' terminating characters is automatically moved within the string if the replacement string length is not equal to the replaced string length.
If the updated string length would exceed the string maximum, an error message is issued.
If the updated string length is equal to the string maximum the X'00' or X'0000' is moved to the extra display positions.
If a VARYINGZ field declaration specifies a maximum length REFER variable, the displayed REFER value may be updated to increase or decrease the maximum string length for the VARYINGZ field. If the new maximum length set by the REFER value is less that the current length of the data string, the data string is truncated and the terminating characters are placed in the new extra positions.
Overtyping of a Graphic VARYINGZ field is not recommended as Graphic strings usually contain undisplayable characters that can't be overtyped in the TABL or SNGL Formats.