k polgardus vowel harmony vowel harmony account term governement optimality krisztina polgardus vowel harmony deal theoretical problem concern phenomenon vowel harmony framework combine insight government phonology optimality theory lexical phonology study introduce motivate general framework examine three issue first concern typology vowel harmony system elementbase feature theory comprise three element u supplement property headedness account different type harmony second concern domain harmony question handle disharmonicity propose model third involve socal neutral vowel e those vowel system harmonic counterpart claim behaviour neutral vowel predict segmental makeup particular property vowel system involve polgrdus argue theory government phonology principlesand parameter approach need supplement constraint rank certain type phenomenon cannot account otherwise since rank show necessary language variation exclusively express device notion param eter abandon polgrdus argue nonderivational version strict cycle condition need incorporate theory account socal derive environment effect disharmonicity show example xius pp isbn paperback lot interna tional sery hil leiden university dissertation price individual order directly publisher nlg excl vat pp holland academic graphic hague http www hag nl rint sybesma holland academic graphic po box ag hague netherland fax 