Paper: Integrated Control of Chart Items for Error Repair

ACL ID C98-2137
Title Integrated Control of Chart Items for Error Repair
Venue International Conference on Computational Linguistics
Session Main Conference
Year 1998

This paper describes a system that performs hierarchical error repair for ill- formed sentences, with heterarchical control of chart items produced at the lexical, syntactic, and semantic levels. The system uses an augmented context-free grammar and employs a bidirectional chart parsing algorithm. The system is composed of four subsystems: for lexical, syntactic, surface case, and semantic processing. The subsystems are controlled by an integrated-agenda system. The system employs a parser for well-formed sentences and a second parser for repairing single error sentences. The system ranks possible repairs by penalty scores which are based on both grammar-dependent factors (e.g. the significance of the repaired constituent in a local tree) and grammar-independent factors...