Customizing the EDIT command

Users issue the EDIT command to enter data into TSO/E. Much of EDIT processing and how you customize EDIT is related to the data set type. TSO/E provides pre-defined data set types with default attributes. Table 1 shows the data set types TSO/E provides and their corresponding default settings.

This section describes the different ways you can customize EDIT processing, which includes:

Defining data set types and changing the default attributes of data set types. The data set types that TSO/E provides may not suit your editing needs. You can define your own data set types for your installation's requirements. You can also change the attributes of the data set types that TSO/E provides or change the attributes of data set types you define.
Writing syntax checkers. You can write a syntax checker for any data set types that you define, which checks for syntax errors when a user edits a data set.
Writing an exit for syntax checkers. You can also write an exit for the syntax checkers you define.
Changing line numbering. You can write an exit to change how the RENUM, MOVE, and COPY subcommands handle the line numbering of records in the data set.
Adding subcommands. You can write your own EDIT subcommand processors for additional editing functions.
Allocating space for utility work data sets. EDIT uses certain algorithms to calculate default space allocation for its utility work data sets. You can preallocate the data sets for your installation.

Table 1. TSO/E pre-defined data set types and attributes
Data set type	Default settings
PLIF	BLOCK=400 FORMAT=FXDONLY FIXED=(80,100) CONVERT=CAPSONLY CHECKER=PLIFSCAN USERSRC=DATASET
FORTE	BLOCK=400 FORMAT=FXDONLY FIXED=(80,80) CONVERT=CAPSONLY CHECKER=IPDSNEXC USERSRC=DATASET
FORTG	BLOCK=400 FORMAT=FXDONLY FIXED=(80,80) CONVERT=CAPSONLY CHECKER=IPDSNEXC USERSRC=DATASET
FORTH	BLOCK=400 FORMAT=FXDONLY FIXED=(80,80) CONVERT=CAPSONLY CHECKER=IPDSNEXC USERSRC=DATASET
TEXT	BLOCK=3120 FORMAT=VAR FIXED=(0,255) VAR=(255,255) CONVERT=ASIS USERSRC=DATASET
DATA	BLOCK=3120 FORMAT=FIXED FIXED=(80,255) VAR=(0,255) CONVERT=CAPS USERSRC=DATASET
CLIST	BLOCK=3120 FORMAT=VAR FIXED=(0,255) VAR=(255,255) CONVERT=CAPSONLY USERSRC=DATASET
CNTL	BLOCK=3120 FORMAT=FXDONLY FIXED=(80,80) CONVERT=CAPSONLY USERSRC=DATASET
ASM	BLOCK=3120 FORMAT=FXDONLY FIXED=(80,80) CONVERT=CAPSONLY PRMPTR=ASM USERSRC=DATASET
COBOL	BLOCK=400 FORMAT=FXDONLY FIXED=(80,80) CONVERT=CAPSONLY PRMPTR=COBOL USERSRC=DATASET
FORTGI	BLOCK=400 FORMAT=FXDONLY FIXED=(80,80) CONVERT=CAPSONLY CHECKER=IPDSNEXC PRMPTR=FORT USERSRC=DATASET
GOFORT	BLOCK=3120 FORMAT=VAR FIXED=(80,255) VAR=(255,255) CONVERT=CAPS CHECKER=IPDSNEXC PRMPTR=GOFORT USERSRC=INCORE
PLI	BLOCK=400 FORMAT=VAR FIXED=(0,100) VAR=(104,104) CONVERT=CAPS PRMPTR=PLIC USERSRC=DATASET
VSBASIC	BLOCK=3120 FORMAT=VAR FIXED=(0,80) VAR=(255,255) CONVERT=CAPSONLY PRMPTR=VSBASIC USERSRC=INLIST DATEXIT=ICDQRNME