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WordNet::Similarity

WordNet::Similarity. Measuring the Relatedness of Concepts Yue Wang Department of Computer Science. Abstract. WordNet::Similarity is a software package that can make it possible to measure the semantic similarity and relatedness between a pair of concepts. Introduction.

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WordNet::Similarity

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  1. WordNet::Similarity Measuring the Relatedness of Concepts Yue Wang Department of Computer Science

  2. Abstract WordNet::Similarity is a software package that can make it possible to measure the semantic similarity and relatedness between a pair of concepts.

  3. Introduction • Measures of similarity • Measures of relatedness These measures are implemented as perl modules which take as input two concepts, and return a numeric value that represents the degree to which they are similar or related.

  4. Measures of Similarity • Is-a hierarchy • Similarity • Measures (res,lin,jcn,lch,wup,path) • Limitation

  5. Is-ahierarchy Measures of similarity use information found in an Is-a hierarchy of concepts. And nouns and verbs are organized into hierarchies of Is-a relations.

  6. Similarity We can use measures of similarity to quantify how much concept A is like concept B.

  7. Limitation Is-a relations in WordNet do not cross part of speech boundaries, so similarity measures are limited to making judgments between noun pairs (e.g. cat and dog) and verb pairs ( e.g. run and walk). While WordNet also includes adjectives and adverbs, that are not organized into Is-a hierarchies, so similarity measures can not be applied.

  8. Measures of Relatedness • Be more general • Relatedness • Measures (hso,lesk,vector) has-part, is-made-of, is-an-attribute-of These measures tend to be more flexible, and allow for relatedness values to be assigned across parts of speech (e.g. the verb murder and the noun gun).

  9. Command The utility similarity.pl allows a user to measure specific pairs of concepts when given in word#pos#sense form. For example, car#n#3 refers to the third WordNet noun sense of car. It also allows for the specification of all the possible senses associated with a word or word#pos combination.

  10. > similarity.pl --type WordNet::Similarity::lin car#n#2 bus#n#1 car#n#2 bus#n#1 0.530371390319309 # railway car versus motor coach • > similarity.pl --type WordNet::Similarity::lin car#n bus#n car#n#1 bus#n#1 0.618486790769613 # automobile versus motor coach • > similarity.pl --type WordNet::Similarity::lin --allsenses car#n bus#n#1 car#n#1 bus#n#1 0.618486790769613 # automobile versus motor coach car#n#2 bus#n#1 0.530371390319309 # railway car versus motor coach car#n#3 bus#n#1 0.208796988315133 # cable car versus motor coach

  11. Thanks for your attention!!

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