FrAG, a Hybrid Constraint Grammar Parser for French

This paper describes a hybrid tagger/parser for French (FrAG), and presents results from ongoing development work, corpus annotation and evaluation. The core of the system is a sentence scope Constraint Grammar (CG), with linguist-written rules. However, unlike traditional CG, the system uses hybrid techniques on both its morphological input side and its syntactic output side. Thus, FrAG draws on a pre-existing probabilistic Decision Tree Tagger (DTT) before and in parallel with its own lexical stage, and feeds its output into a Phrase Structure Grammar (PSG) that uses CG syntactic function tags rather than ordinary terminals in its rewriting rules. In a recent test run on Parliamentary debate transcripts, FrAG achieved F-scores of 98.7 % for part of speech (PoS) and 92.6 % for syntactic function tags. 1 CG with probabilistic input This paper describes a hybrid tagger/parser for French, the French Annotation Grammar (FrAG), and presents preliminary results from ongoing development wor...

• Type: Conference
• Year: 2010
• Where: LREC
• Authors: Eckhard Bick
• Keywords: Education, LREC 2010, Scope Constraint Grammar, Sentence Scope Constraint, Syntactic Function Tags