Abstract: Method for large syntactical analysis based on unsupervised learning on a corpus comprising an iterative sequencing of two phases: a learning phase wherein linguistic information is acquired using unambiguous analysis cases, and a resolution phase wherein ambiguous analysis cases are resolved using information acquired during the learning phase. The invention is used in particular for creating specialized terminological resources for an information processing system, for creating an ontology for a specialized information search engine on the web, for a terminological lexicon for an automatic translation system, or for a thesaurus for an automatic indexing system.