tailieunhanh - Báo cáo khoa học: "Finite Structure Query: A Tool for Querying Syntactically Annotated Corpora"

In recent years large amounts of electronic texts have become available providing a new base for empirical studies in linguistics and offering a chance to linguists to compare their theories with large amounts of utterances from "the real world". While tagging with morphosyntactic categories has become a standard for almost all corpora, more and more of them are nowadays annotated with refined syntactic information. Examples are the Penn Treebank (Marcus et al., 1993) for American English annotated at the University of Pennsylvania, the French treebank (AbelIle and Clement, 1999) developed in Paris, the NEGRA Corpus (Brants et al., 1999). | Finite Structure Query A Tool for Querying Syntactically Annotated Corpora Stephan Kepser SFB 441 - University of Tubingen Nauklerstr. 35 72074 Tubingen Germany kepser@ Abstract Finite structure query fsq for short is a tool for querying syntactically annotated corpora fsq employs a query language of high expressive power namely full first order logic. It can be used to query arbitrary finite structures not just trees. 1 Introduction In recent years large amounts of electronic texts have become available providing a new base for empirical studies in linguistics and offering a chance to linguists to compare their theories with large amounts of utterances from the real world . While tagging with morphosyntactic categories has become a standard for almost all corpora more and more of them are nowadays annotated with refined syntactic information. Examples are the Penn Treebank Marcus et al. 1993 for American English annotated at the University of Pennsylvania the French treebank Abeillé and Clement 1999 developed in Paris the NEGRA Corpus Brants et al. 1999 for German annotated at the University of Saarbriicken and the Tubingen Treebanks Hinrichs et al. 2000 for Japanese German and English from the University of Tubingen. To make these rich syntactic annotations accessible for linguists the development of powerful query tools is an obvious need and has become an important task in computational linguistics. In this paper we present finite structure query fsq a query tool for syntactically annotated corpora. Special emphasis in the development of fsq is layed on providing users a very powerful query language. Therefore full first-order logic was chosen as query language which allows arbitrary quantifications over nodes in a tree. This choice is to the authors knowledge unique no other query tool offers such an expressive power. It is on the other hand not arbitrary we will show that there are interesting linguistic queries that require such an .

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