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httpRange-14 is a long-running logical conundrum or design problem in the semantic web. The problem arises because when HTTP is extended from referring only to documents to talking about real-world things (planets, flowers, emotions, Platonic forms, etc) the domain of HTTP GET becomes undefined. == History == The HTTP protocol was originally designed to transfer information objects, specifically Hypertext such as HTML. The GET request was issued by a client to the retrieve data at a particular URL. Retrieving non-HTML information objects (images, flash files, CSS files, streaming video, etc) was not a problem, since all of these could be streamed across the network using standard approaches developed by earlier protocols (Kermit had been around since 1981, more than ten years prior to the development of HTML). The semantic web was invented, spearheaded by the W3C and Tim Berners-Lee, which used URLs to refer to real world things (planets, flowers, emotions, Platonic forms, etc) which could not be reduced to network streams. The question of what web servers should do when asked for one of these things arose. == Use of # == URIs of real world things can be limited to 'hash URIs', that is URIs containing a fragment identifier. These URIs cannot by directly deferenced via HTTP so the protocol does not need to worry about the conflict. In this approach a URI not ending in a hash is understood to refer to a document, whereas the same URI with a '#' appended can refer to an abstract concept.〔http://dannyayers.com/2011/06/15/httpRange-14-Reflux〕 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「HTTPRange-14」の詳細全文を読む スポンサード リンク
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