With this session parameter, you can suppress the printing of identical information in successive lines created by a WRITE or DISPLAY statement.

Possible settings	ON	A value which is identical to the previous value for the field will not be displayed. Note: If a DISPLAY or WRITE statement is used to create multiple output lines using the VERT or slash (/) notation, IS=ON applies only to the first line.
	OFF	No automatic suppression will be used.
Default setting	OFF
Specification within session	yes
Applicable statements	DISPLAY FORMAT WRITE
Applicable command	none

Notes:

1. The IS parameter setting can be suspended for one record by issuing the SUSPEND IDENTICAL SUPPRESS statement.
2. The IS parameter may be used in combination with the parameters ES and ZP to cause empty line suppression.
3. See also Parameters to Influence the Output of Fields in the Programming Guide.

Example:

FORMAT IS=ON