MODS Administration › Maintaining the MODS Control File › Control Files

Control Files

A MODS control file contains component definitions for use by NCL applications. It contains both application and common components as follows:

• Application dependent components:
  • $AR—Application Definitions
  • $CR—Criteria
  • $HM—Help
  • $LD—Language Services (Presentation Elements and String Definitions)
  • $LH—Lists
  • $MH—Menus
  • $MS—Messages
  • $RW—Reports
  • $VM—Tables
• Common (non-application dependent) components:
  • $CM—Commands
  • $LD—Language Services (Language Definitions)
  • $PS—Print Services Manager (PSM) Definitions

The components contained within a control file consist of the following sub components and entities Subcomponents preceded with the square bullet can be acted upon as individual entities, while those preceded with a hyphen ( – ) are acted upon automatically when the parent subcomponent is affected.

$AR - Application Register

Contains the following subcomponent:

• Application Identifiers

$CR - Criteria

Contains the following subcomponent:

• Criteria Definitions

$CM - Commands

Contains the following subcomponent:

• Command Definitions

$HM - Help

Contains the following subcomponents:

• Function-level help

• Window-level help
• Field-level help

$LD - Language Services (Language Definitions)

Contains the following subcomponent:

• Language Definitions

$LD - Language Services (Presentation Elements and String Definitions)

Contains the following subcomponents:

• Presentation Elements
• String Definitions

$LH - Lists

Contains the following subcomponent:

• List Definitions

$MH - Menus

Contains the following subcomponent:

• Menu Definitions

$MS - Messages

Contains the following subcomponent:

• Message Definitions

$PS - Print Services Manager (PSM) Definitions

Contains the following subcomponents:

• Printer Definitions
• Form Definitions
• Setup Definitions
• Default Printer Assignments

$RW - Reports

Contains the following subcomponents:

• Report Definitions

• Report Descriptions
• Report Headers
• Page Headers
• Control Break Headers
• Data Formats
• Control Break Trailers
• Page Trailers
• Report Trailers
• Sort Fields

$VM - Tables

Contains the following subcomponents:

• Table Definitions

• Table Entries

Important! Due to the logical relationships between the records in a control file, you must not perform maintenance using REPRO or other file utilities. These utilities should not be used for any purpose other than to perform backups as they cannot take account of these logical relationships and could corrupt the control file with unpredictable consequences.