Date Mining with Ontologies: Implementations, Findings and by Héctor Oscar Nigro, Sandra Elizabeth Gonzalez Cisaro, Daniel

By Héctor Oscar Nigro, Sandra Elizabeth Gonzalez Cisaro, Daniel Hugo Xodo

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Then, we use the hierarchy to augment the elements of the chains PCi and PCj with their synonyms. , synonyms). The augmented elements of PCi and PCj respectively, are defined as: AugElements ( PCi ) = Ci  SynCi and AugElements ( PC j ) = C j  SynC j, where, SynCi denotes the set of the ontology’s concepts that are synonyms to any of the elements in Ci and SynCj denotes the set of the ontology’s concepts that are synonyms to any of the elements in Cj. The common elements between the augmented lexical chains PCi and PCj, are determined as: ComElements ( PCi , PC j ) = AugElementsi  AugElements j We formally define the problem of computing pages’ semantic similarities as follows: if pages Pi and Pj share elements in common, produce the correlation look up table with triples of the form .

What’s new on the web? The evolution of the web from a search engine perspective. In Proceedings of the 13th InternationalWorld Wide Web (WWW) Conference (pp. 1-12). , & Hirst, G. (2006) Evaluating WordNet based measures of lexical semantic relatedness. Computational Linguistics, 32(1), 13-44. , & Chi, E. (2003). ScentTrails: Intergrading browsing and searching. ACM Transactions on Computer-Human Interaction, 10(3), 1-21. , & Billsus, D. (1997). Learning and revising user profiles: The identification of interesting Web sites.

Moreover, words’ cooccurrence statistics were precomputed in the corpus and stored in inverted lists, which were again made accessible upon demand. Of course, the execution time of TODE’s categorizations 0 depends on both the number of pages considered and the ontology’s coverage. In our experimental setup it took only a few hours to categorize our whole dataset. In order to study the efficiency of our approach in populating Web directories, we conducted an experiment in which we supplied TODE with roughly 320K Web pages, inquiring that these are categorized in the appropriate top or middle level ontology’s concepts.

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