Optimal Ambiguity Packing in Context-free Parsers with Interleaved Unification

Alon Lavie, Carolyn Penstein Rosé


Abstract
Ambiguity packing is a well known technique for enhancing the efficiency of context-free parsers. However, in the case of unification-augmented context-free parsers where parsing is interleaved with feature unification, the propagation of feature structures imposes difficulties on the ability of the parser to effectively perform ambiguity packing. We demonstrate that a clever heuristic for prioritizing the execution order of grammar rules and parsing actions can achieve a high level of ambiguity packing that is provably optimal. We present empirical evaluations of the proposed technique, performed with both a Generalized LR parser and a chart parser, that demonstrate its effectiveness.
Anthology ID:
2000.iwpt-1.16
Volume:
Proceedings of the Sixth International Workshop on Parsing Technologies
Month:
February 23-25
Year:
2000
Address:
Trento, Italy
Venues:
IWPT | WS
SIG:
SIGPARSE
Publisher:
Association for Computational Linguistics
Note:
Pages:
147–158
Language:
URL:
https://aclanthology.org/2000.iwpt-1.16
DOI:
Bibkey:
Cite (ACL):
Alon Lavie and Carolyn Penstein Rosé. 2000. Optimal Ambiguity Packing in Context-free Parsers with Interleaved Unification. In Proceedings of the Sixth International Workshop on Parsing Technologies, pages 147–158, Trento, Italy. Association for Computational Linguistics.
Cite (Informal):
Optimal Ambiguity Packing in Context-free Parsers with Interleaved Unification (Lavie & Rosé, IWPT 2000)
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PDF:
https://preview.aclanthology.org/update-css-js/2000.iwpt-1.16.pdf