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Quertle
Quertle is a semantic search engine for life and chemical science literature and information.〔(University of Colorado-Denver Health Science Library | Quertle Biomedical Search Engine )〕〔(Science Intelligence and InfoPros | Quertle: A new semantic search for Medline )〕〔(BioJob Blog | Quertle: A Powerful, New Search Engine )〕 It covers a wide variety of information sources.
==How Quertle Works==
Quertle uses semantic-based linguistics to automatically extract subject–verb–object relationships asserted by the author(s) of each document. The identification of these assertions uses several methods including natural language processing. For full-text documents, Quertle includes only the main content, not, for example, the references.
The subject–verb–object relationships are stored in a metadatabase and the user's query is matched against that metadata. This identifies documents based on meaning and context and generally provides fewer, but more relevant, hits than a traditional keyword search. Thus, Quertle is fundamentally different from search sites such as PubMed. Nonetheless, Quertle does simultaneously search a keyword index to find documents based on inclusion of the search terms. These are presented on a separate tab in the results.
An ontology covering genes, proteins, chemicals, diseases, cell types, and other life, chemical, and biomedical science nomenclature is used to automatically search for all variants of a term in the user's query. For example, a search for "aspirin" will find asserted relationships that mention "acetylsalicylic acid". The ontology also is used to find members of a class of entities, such as "neurotransmitters".
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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