http://www.cnr.it/ontology/cnr/individuo/prodotto/ID91003

Expanding Domain-Specific Lexicons by Term Categorization (Contributo in atti di convegno)

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Expanding Domain-Specific Lexicons by Term Categorization (Contributo in atti di convegno) (literal)

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Avancini H. 1, Lavelli A. 2, Magnini B. 3, Sebastiani F. 4, Zanoli R. 5 (2003)
Expanding Domain-Specific Lexicons by Term Categorization
in SAC-03, 18th ACM Symposium on Applied Computing, Melbourne, US
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Avancini H. 1, Lavelli A. 2, Magnini B. 3, Sebastiani F. 4, Zanoli R. 5 (literal)

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We discuss an approach to the automatic expansion of domain-specific lexicons by means of term categorization, a novel task employing techniques from information retrieval (IR) and machine learning (ML). Specifically, we view the expansion of such lexicons as a process of learning previously unknown associations between terms and domains. The process generates, for each ci in a set C={c1,...,cm} of domains, a lexicon Li1, bootstrapping from an initial lexicon Li0 and a set of documents theta given as input. The method is inspired by text categorization (TC), the discipline concerned with labelling natural language texts with labels from a predefined set of domains, or categories. However, while TC deals with documents represented as vectors in a space of terms, we formulate the task of term categorization as one in which terms are (dually) represented as vectors in a space of documents, and in which terms (instead of documents) are labelled with domains. (literal)

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