public Parser qualifiedDataName() {
        if (qualifiedDataNameParser == null) {
           FutureParser future = scoped("qualifiedDataName");
           qualifiedDataNameParser = future;
           future.setParser(
               sequence(
                   dataName(),
                   qualifier(),
                   optional(
                       sequence(
                           token("("),
                           plus(
                               subscript()
                           ),
                           token(")")
                       )
                   )
               )
           );
        }

        return qualifiedDataNameParser;
    }