public Parser alphabetType() {
        if (alphabetTypeParser == null) {
           FutureParser future = scoped("alphabetType");
           alphabetTypeParser = future;
           future.setParser(
               choice(
                   standard1AlphabetType(),
                   standard2AlphabetType(),
                   nativeAlphabetType(),
                   asciiAlphabetType(),
                   ebcdicAlphabetType(),
                   explicitAlphabetType(),
                   codeNameAlphabetType()
               )
           );
        }

        return alphabetTypeParser;
    }