Valenční slovníky typicky obsahují informace o nepříznakovém užití sloves (aktivní formu); nicméně slovesa typicky vstupují do různých povrchových struktur. Zde se soustřeďujeme na popis změn ve valenční struktuře, a to změn spojených s diatezemi.
Valency lexicons typically describe only unmarked usages of verbs (the active form); however verbs prototypically enter different surface
structures. In this paper, we focus on the so-called diatheses, i.e., the relations between different surface syntactic manifestations of verbs
that are brought about by changes in the morphological category of voice, e.g., the passive diathesis. The change in voice of a verb is
prototypically associated with shifts of some of its valency complementations in the surface structure. These shifts are implied by changes
in morphemic forms of the involved valency complementations and are regular enough to be captured by syntactic rules. However, as
diatheses are lexically conditioned, their applicability to an individual lexical unit of a verb is not predictable from its valency frame
alone. In this work, we propose a representation of this linguistic phenomenon in a valency lexicon of Czech verbs, VALLEX, with the
aim to enhance this lexicon with the information on individual types of Czech diatheses. In order to reduce the amount of necessary
manual annotation, a semi-automatic method is developed. This method draws evidence from a large morphologically annotated corpus,
relying on grammatical constraints on the applicability of individual types of diatheses.