If the variable value is not a prefix (does not end in an asterisk before any trailing blanks), it must be the exact length of the RNAME being requested. For compiled programs, this can be controlled on the VDEFINE or VREPLACE statement. The exceptions to this rule are for QNAMEs SPFEDIT and SPFUSER. For SPFUSER requests, the variable name is padded or truncated to 7 characters. For SPFEDIT requests, variables less than 45 characters in length are padded with blanks to 44 and treated as a prefix. Variables longer than 44 characters are padded to 52 and not treated as a prefix. Variables that are passed in as a prefix are not changed.