Grammar Extraction and Refinement from an HPSG Corpus

Grammar learning and refinement on the basis of language resources is very appealing in comparison with manual development of formal grammar. But in order to learn a complex grammar a complex resource is needed. Thus the creation of language resources and learning of grammars from them have to be aware of each other. In this paper we define a formal basis for annotation of corpora with respect to a contemporary linguistic theory — HPSG and a methodology for extraction of grammars from such corpora. Also we describe an approach to incremental refinement of an HPSG grammar in the process of annotation of an HPSG Corpus.