Paper: Processing Unknown Words in HPSG

ACL ID C98-1014
Title Processing Unknown Words in HPSG
Venue International Conference on Computational Linguistics
Session Main Conference
Year 1998

The lexical acquisition system presented in this pa- per increlnenlally updates linguistic properties of un- known words inferred lrom their surrounding con- lexI by parsing senlences wilh an liPSG gramnmr for Gerlmm. We employ a gradual, infornmtion- based concept of "tlnknowntless" providing a uni- form treatment for the range oi completely known to maximally unknown lexical entries. "Unknown" in- formation is viewed as revisable inR)rmation, which is either generalizable or specializable. Updating takes place after parsing, which only requires a mod- ified lexical lookup. Revisable pieces of informa- lion are idenlilied by grammar-specilied declaralions which provide access pmhs into lhe parse feature slructure. The updating nlechanism revises the col responding places i...