By Bunt Harry, Nijholt Anton (auth.), Harry Bunt, Anton Nijholt (eds.)
Parsing expertise is worried with discovering syntactic constitution in language. In parsing we need to take care of incomplete and never inevitably actual formal descriptions of common languages. Robustness and potency are one of the major issuesin parsing. Corpora can be utilized to procure frequency information regarding language use. this permits probabilistic parsing, an strategy that goals at either robustness and potency raise. Approximation ideas, to be utilized on the point of language description, parsing procedure, and syntactic illustration, have a similar target. Approximation on the point of syntactic illustration is usually referred to as underspecification, a conventional strategy to care for syntactic ambiguity.
during this publication new parsing applied sciences are accrued that target at attacking the issues of robustness and potency through precisely those ideas: the layout of probabilistic grammars and effective probabilistic parsing algorithms, approximation strategies utilized to grammars and parsers to extend parsing potency, and methods for underspecification and the mixing of semantic details within the syntactic research to accommodate significant ambiguity.
The publication provides a cutting-edge assessment of present examine and improvement in parsing applied sciences. In its chapters we see how probabilistic tools have entered the toolbox of computational linguistics in an effort to be utilized in either parsing concept and parsing perform. The e-book is either a special reference for researchers and an creation to the sphere for graduate students.
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Extra resources for Advances in Probabilistic and Other Parsing Technologies
1995). Statistical decision-tree models for parsing . In Proceedings of the 33rd Meeting of the Association for Computational Linguistics, pp. 276-283. Magerman, D. and Marcus, M. (1991). Pearl: a probabilistic chart parser. In Proceedings ofthe Second International Workshop on Parsing Technologies, pp. 193-199. , Katz, K, and Schasberger, B. (1994). The Penn Treebank: annotating predicate argument structure. In Proceedings ofthe HumanLanguage Technology Workshop, March 1994. Morgan Kaufmann, San Francisco, CA.
The algorithm also applies to the Treebank Grammars of Charniak (1995). Furthermore, it applies to the head-automaton grammars (HAGs) of Alshawi (1996) and the phrase-structure models of Collins, (1996); Collins, (1997), allowing O(n3 )-time rather than O(n5 )-time parsing, granted the (linguistically sensible) restrictions that the number of distinct Xbar levels is bounded and that left and right adjuncts are independent of each other. 3 ORGANIZATION OF THE CHAPTER This chapter is organized as follows.
1 This chapter introduces weighted bilexical grammars, a formalism in which individual lexical items, such as verbs and their arguments, can have idiosyncratic selectional influences on each other. Such 'bilexicalism' has been a theme of much current work in parsing. The new formalism can be used to describe bilexical approaches to both dependency and phrase-structure grammars, and a slight modification yields link grammars . Its scoring approach ik compat ible with a wide variety of probability models.
Advances in Probabilistic and Other Parsing Technologies by Bunt Harry, Nijholt Anton (auth.), Harry Bunt, Anton Nijholt (eds.)