full text search Wikipedia - Search
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    Wikipedia
    https://en.wikipedia.org › wiki › Full-text_search

    Full-text search - Wikipedia

    • Full-text search is distinguished from searches based on metadata or on parts of the original texts represented in databases (such as titles, abstracts, selected sections, or bibliographical references). See more

    Overview

    In text retrieval, full-text search refers to techniques for searching a single computer-stored document or a collection … See more

    Indexing

    When dealing with a small number of documents, it is possible for the full-text-search engine to directly scan the contents of the documents with each query, a strategy called "serial scanning". This is what some … See more

    The precision vs. recall tradeoff

    Recall measures the quantity of relevant results returned by a search, while precision is the measure of the quality of the results returned. Recall is the ratio of relevant results returned to all relevant results. Pre… See more

    False-positive problem

    Full-text searching is likely to retrieve many documents that are not relevant to the intended search question. Such documents are called false positives (see Type I error). The retrieval of irrelevant documents is often cause… See more

    Performance improvements

    The deficiencies of full text searching have been addressed in two ways: By providing users with tools that enable them to express their search questions more precisely, and by developing new search algorithms t… See more

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