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Unaided
query, or assisted via
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Natural
language processing and query formulation
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Search
across multiple engines
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Fuzzy
search for OCR’d text and other typos
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Term
expansion via thesaurus, e.g. RUSSIA=USSR
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Summarization
via
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Hand-input
abstracts
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Relevance-ranked
extracted sentences
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Machine-assembled
text
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Ranking
via
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Location
and frequency of keywords (AltaVista)
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Site
popularity or references (Google)
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Reviewer
schemas (Yahoo)
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