Abstract

Squirrel, a search and browse tool that provides access to semantically annotated data is described. The tool offers a hybrid approach to search allowing the user to enter simple search terms and then refine their search or browse to related materialthrough the presentation of appropriate metadata. Squirrel builds upon and integrates a number of the semantic technologycomponents described elsewhere in the book. These include machine learning and information extraction components which generate,extract and manage semantic metadata contained within and about textual documents at index time. A number of run-time componentshave also been integrated to deliver an enhanced user experience such as natural language generation which provides naturallanguage summaries of knowledge held in formal (ontological) structures; device independence which allows the tool to be runon multiple devices; result consolidation which presents the most relevant textual content of result documents rather thana simple list of results; and a natural language interface which translates natural language queries into structured queriesformulated with respect to a given ontology.

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