The REP subcommand

The REP subcommand replaces a string in the new block with another string. Optionally, this subcommand verifies the original string before making the replacement. This subcommand is valid only with the READ UPDATE function.

Syntax of the REP subcommand of READ UPDATE

   REP new-string
       OFFSET(xxx)
       [VER(old-string)]

where:

new-string

specifies the new string of data.

The data can be hexadecimal (which is specified as X'string') or characters (which can be enclosed in quotation marks or not). Hexadecimal strings are right-aligned and padded with zeros to a byte boundary. Character strings are left-aligned and padded with zeros to a byte boundary.

If new-string contains lowercase characters, new-string must be enclosed in quotation marks. If new-string is not enclosed in quotation marks, all characters are treated as uppercase characters, regardless of the case in which you enter them.

OFFSET(xxx)

Specifies the offset into the block where the string is to be replaced.

VER(old-string)

Specifies the original string that is to be verified. If the string is not found at offset xxx into the new block, the replacement is not made.

If old-string contains lowercase characters, old-string must be enclosed in quotation marks. If you do not enclose old-string in quotation marks, all characters are treated as uppercase characters, regardless of the case in which you enter them.

Note: The verify (VER) operand only verifies the characters specified; it does not verify the whole string. Be sure to enter the entire string you want verified.