22. Extracting specialized collocations using lexical functions

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This chapter presents a method for extracting specialized verb + noun collocations based on lexical functions, the formal device developed within the framework of theMeaning-Text theory to represent collocations. Although based on a linguistic analysis of collocations, our program (<i>Colex</i>) uses statistical measures to distinguish true collocations from free combinations.We argue that log-likelihood is a better measure of precision in this domain than mutual information.We are now developing the semantic encoding of the combinations extracted by <i>Colex</i>. We believe that a filter based on measuring a combination’s ability to be encoded as a lexical function would achieve higher precision than a purely statistical filter.


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