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| Contextual searching ： ウィキペディア英語版 |
Contextual searching
Contextual search is a form of optimizing web-based search results based on context provided by the user and the computer being used to enter the query. Contextual search services differ from current search engines based on traditional information retrieval that return lists of documents based on their relevance to the query. Rather, contextual search attempts to increase the precision of results based on how valuable they are to individual users.
== Basic Contextual Search ==
The basic form of contextual search is the process of scanning the full-text of a query in order to understand what the user needs. Web search engines scan HTML pages for content and return an index rating based on how relevant the content is to the entered query. HTML pages that have a higher occurrence of query keywords within their content are rated higher. Users have limited control over the context of their query based on the words they use to search with.〔Steve Lawrence. ''Context in Web Search'', IEEE Data Engineering Bulletin, Volume 23, Number 3, pp. 25, 2000.〕 For example, users looking for the menu portion of a website can add “menu” to the end of their query to provide the search engine with context of what they need. The next step in contextualizing search is for the search service itself to request information that narrows down the results, such as Google asking for a time range to search within.
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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