Analyse en dépendances à l'aide des grammaires d'interaction

This article proposes a method to extract dependency structures from phrase- structure level parsing with Interaction Grammars. Interaction Grammars are a formalism which expresses interactions among words using a polarity system. Syntactical composition is led by the saturation of polarities. Interactions take place betw een constituents, but as grammars are lexicalized, these interactions can be translated at the le vel of words. Dependency relations are extracted from the parsing process : every dependency is the consequence of a polarity satura- tion. The dependency relations we obtain can be seen as a refin ement of the usual dependency tree. Generally speaking, this work sheds new light on links between phrase structure and de- pendency parsing. Mots-cles : Analyse syntaxique, grammaires de dependances, grammaires d'interaction, polarite.