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A dependency-based method for evaluating broad-coverage parsers

Published online by Cambridge University Press:  01 June 1998

Department of Computer Science, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2; e-mail:


With the emergence of broad-coverage parsers, quantitative evaluation of parsers becomes increasingly more important. We propose a dependency-based method for evaluating broad-coverage parsers that offers more meaningful performance measures than previous approaches. We also present a structural pattern-matching mechanism that can be used to eliminate inconsequential differences among different parse trees. Previous evaluation methods have only evaluated the overall performance of parsers. The dependency-based method can also evaluate parsers with respect to different kinds of grammatical relationships or different types of lexical categories. An algorithm for transforming constituency trees into dependency trees is presented, which makes the evaluation method applicable to both constituency grammars and dependency grammars.

Research Article
© 1998 Cambridge University Press

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