IRCS Technical Reports Series

Document Type

Technical Report

Date of this Version

April 1995


University of Pennsylvania Institute for Research in Cognitive Science Technical Report No. IRCS-95-09.


This paper presents the XTAG system, a grammar development tool based on the Tree Adjoining Grammar (TAG) formalism that includes a wide-coverage syntactic grammar for English. The various components of the system are discussed and preliminary evaluation results from the parsing of various corpora are given. Results from the comparison of XTAG against the IBM statistical parser and the Alvey Natural Language Tool parser are also given.



Date Posted: 15 September 2006