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Link awareness is defined as the ability to discover, view, search and update global hyperlink information about any resource with a URL on the World Wide Web. This global link information is a shared information resource. Implementing link awareness is difficult. In practice, an implementation only approximates link awareness. There are at least two qualitative axes on which we can classify these implementations. * Breadth of Coverage: The number and type of interlinked documents covered. * Liveness: The ability (or lack thereof) to update the link information on the fly. ==Implementation examples== * Most WikiWiki implementations support link awareness within the scope of the documents that they host. Their breadth of coverage (insofar as link information is concerned) is ''narrow''. A wiki, however, is ''very'' live (and indeed, liveness, is its ''raison d'etre''). * Google supports link awareness through its web interface. (You type in a query of the form link:<URL>.) Google's breadth is impressive (it covers a lot of interlinked documents), but it is a far cry from live (it can take months before Google indexes a newly created document).抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Link awareness」の詳細全文を読む スポンサード リンク
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