AUTOR: Ekaterina Ovchinnikova AFILIACJA: St. Petersburg State University TYTUŁ: Once more about syntactical and lexical disambiguation STRESZCZENIE: This talk introduces the grammar implementation platform IdeoLog and describes the syntactic and lexical disambiguation procedure, based on using both syntactic structures and lexical information for predicate words. Two formal grammars mechanisms are taken for syntactic analyses: Affix Grammar over the Finite Lattice (AGFL) and Head Driven Phrase Structure Grammar (HPSG). Lexical information is taken from the wordnet-type lexicon, containing valence frames for predicate synsets, which include morphological and semantic information about the highly reliable context keys for members of a given synset. If valence frame is verified by syntactic structure, the particular meaning of the word is ranked as approved. Proposed analysis is realized for the Russian language.