| Summary: | In this dissertation, I investigate valencies and syntactically relevant semantic categories in North Sámi. In addition, I develop three machine-readable grammars for the North Sámi grammar checker GoDivvun that have access to valencies and semantics. Like a human, a machine-readable grammar analyzes a sentence by putting together information from different linguistic levels and based on this, selects or discards certain interpretations. Grammatical errors and the extensive homonoymy of well-formed input complicate a reliable sentence analysis based on morphology and syntax alone. I therefore add valency tags to 500 North Sámi verbs and annotate semantic prototype categories to 71% of the noun lexicon. This adds a semantic layer to the sentence analysis that is used to identify governor- argument structures in the process of error detection. I evaluate the detection of a test set of local and global errors resulting in a precision above 98% for local errors and a precision above 77% for global errors. While semantic prototype tagging is the backbone of local error detection, valency annotation is the back- bone of global error detection. My approach shows that a deep syntactic and semantic sentence analysis is beneficial for local error detection and necessary for reliable global error detection. Dán doavttirgrádačállosis mun dutkkan valeanssaid ja semánttalaš kategoriijaid syntávssalaš váikkuhusaid. Lean ovttas huksen Divvun-joavkkuin davvisámi grammatihkkadivvunprográmma, man gohčodan GoDivvun. Dasa lean ráhkadan golbma mášenlogahahtti grammatihka, main valeanssat ja semantihkka leat olámuttus. Mášenlogahahtti grammatihkka doaibmá dego olmmoš: dat bidjá oktii dieđuid iešguđet giellaoahpalaš dásis ja dan vuođul analysere cealkaga ja vállje muhtun dulkomiid ovdal earáid. Homonymiija ja giellaoahpalaš meattáhusat dahket luohttevaš cealkkaanalysa váttisin, jus dušše atná morfologiija ja syntávssa vuođđun. Čoavddusin lean lasihan valeansagilkoriid 500 davvisámi verbii ja semánttalaš prototyhpaid substantiivvaide. ...
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