FORMAT (USSTAB)

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   .-FORMAT--=--DYNAMIC-----.   
>>-+------------------------+----------------------------------><
   |            .-DYNAMIC-. |   
   '-FORMAT--=--+---------+-'   
                '-OLD-----'     

Specifies how the USS table will be formatted.
FORMAT=DYNAMIC
Specifies that the MODIFY TABLE command can be used to dynamically replace the USS table. Also, use FORMAT=DYNAMIC to permit terminal operators to specify the USS table using the LANGTAB operand on a USS command.

Specifying FORMAT=DYNAMIC can significantly reduce the CPU time required to search for VTAM® operator messages. See z/OS Communications Server: SNA Operation for more information about dynamically replacing the USS table.

FORMAT=DYNAMIC is coded in both the IBM-supplied USS tables — ISTINCNO and ISTINCDT.

FORMAT=OLD
Specifies that the table is not dynamically replaceable.