}

    // ---------------------------------------------------------------------
    @Override
    public boolean equals(Object vo) {
        if (!(vo instanceof MetadataGraphVertex)) {
            return false;
        }
        return compareTo((MetadataGraphVertex) vo) == 0;
    }

    // ---------------------------------------------------------------------

    @Override
    public int hashCode() {

tn: Setswana
to: faka Tonga
tr: Türkçe
ts: Xitsonga
tt: татар теле
tw: Twi
ty: Reo Tahiti
ug: ئۇيغۇرچە‎
uk: українська мова
ur: اردو
uz: Ўзбек
ve: Tshivenḓa
vi: Tiếng Việt
vo: Volapük
wa: walon
wo: Wollof
xh: isiXhosa
yi: ייִדיש
yo: Yorùbá
za: Saɯ cueŋƅ
zh: 简体中文
zh-hant: 繁體中文

        map.put("ヴァ", new String[] { "va" });
        map.put("ヴィ", new String[] { "vi" });
        map.put("ヴ", new String[] { "vu" });
        map.put("ヴェ", new String[] { "ve" });
        map.put("ヴォ", new String[] { "vo" });

        map.put("ギャ", new String[] { "gya" });
        map.put("ギュ", new String[] { "gyu" });
        map.put("ギョ", new String[] { "gyo" });
        map.put("ギェ", new String[] { "gye" });