Paper: Coping With Derivation In A Morphological Component

ACL ID E93-1043
Title Coping With Derivation In A Morphological Component
Venue Annual Meeting of The European Chapter of The Association of Computational Linguistics
Session Main Conference
Year 1993
  • Harald Trost (Austrian Research Institute for Artificial Intelligence, Vienna Austria)

In this paper a morphological component with a limited capability to automatically interpret (and generate) derived words is presented. The system combines an ex- tended two-level morphology [Trost, 1991a; Trost, 1991b] with a feature-based word grammar building on a hierarchical lexicon. Polymorphemic stems not explicitly stored in the lexicon are given a compositional in- terpretation. That way the system allows to minimize redundancy in the lexicon be- cause derived words that are transparent need not to be stored explicitly. Also, words formed ad-hoc can be recognized correctly. The system is implemented in CommonLisp and has been tested on examples from Ger- man derivation.