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Informs the user that the current page cannot be viewed offline. Internet Explorer 9 and later do not support offline browsing. 6–8 about:postnotcached: Informs the user that the current page needs to refresh and any information entered in a form will have to be re-posted. 6–11 about:securityrisk
The data URI scheme is a uniform resource identifier (URI) scheme that provides a way to include data in-line in Web pages as if they were external resources. It is a form of file literal or here document.
The HTTP Location header field is returned in responses from an HTTP server under two circumstances: To ask a web browser to load a different web page (URL redirection). In this circumstance, the Location header should be sent with an HTTP status code of 3xx. It is passed as part of the response by a web server when the requested URI has:
A Uniform Resource Identifier (URI), formerly Universal Resource Identifier, is a unique sequence of characters that identifies an abstract or physical resource, [1] such as resources on a webpage, mail address, phone number, [2] books, real-world objects such as people and places, concepts. [3]
External links and references are two important elements of Wikipedia that newcomers sometimes find trouble with. This page is designed to cover only the technical aspects of linking and referencing; it is essential that editors also familiarize themselves with Wikipedia:External links, Wikipedia:Reliable sources and Wikipedia:Citing sources, as well as Wikipedia's various other policies ...
For example, if the client asked for a part of the file that lies beyond the end of the file. Called "Requested Range Not Satisfiable" previously. [16]: §10.4.17 417 Expectation Failed The server cannot meet the requirements of the Expect request-header field. [17] 418 I'm a teapot (RFC 2324, RFC 7168)
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The meta element has two uses: either to emulate the use of an HTTP response header field, or to embed additional metadata within the HTML document. With HTML up to and including HTML 4.01 and XHTML, there were four valid attributes: content, http-equiv, name and scheme. Under HTML 5, charset has been added and scheme has been removed.