The table containing the member tokens of the target members is an array of entries. Each entry has the same fixed size (specified by NEXTTARGETOFF) and can contain data other than the target member token. The number of entries in the table is specified with the #TARGETS keyword. XCF iteratively processes the table for the specified number of entries, sending the message to the member indicated by each member token in the entry.

To maintain a fixed size table that allows for members to join and leave an XCF group, XCF ignores member tokens with a value of X'0'. The sender then can use these “slots” at a later time for insertion of a new member token. The sender is assured that the table of target members has a one-to-one correspondence with any other XCF table constructed for this request. Be aware however, that a table containing a significant number of null entries can cause additional system overhead.