All other coding guidelines that apply when only the required name is defined also apply when both the required name and the optional name are defined.

When VTAM® finds a match on an ACBNAME operand, the characters on the APPLID operand on the ACB macroinstruction matching the wildcard characters in the optional name specified on the ACBNAME operand are substituted in the required name, in left-to-right order, by wildcard type. That is, the character that matches the first question mark specified on the ACBNAME operand is substituted for the first question mark in the required name. The character that matches the second question mark is substituted for the second question mark in the required name. All the characters (including none) in the name specified on the APPLID operand on the ACB macroinstruction that match the asterisk in the optional name specified on the ACBNAME operand are substituted for the asterisk in the required name.