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Why is it allowed to send XHTML 1.0 documents as text/html?

April 26, 2017allowed answer Broken BROWSERS documents html interview question interview question and answer interview questions job interview question sample interview question send text Validator XHTML

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Why is it allowed to send XHTML 1.0 documents as text/html?

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XHTML is an XML format; this means that strictly speaking it should be sent with an XML-related media type (application/xhtml+xml, application/xml, or text/xml). However XHTML 1.0 was carefully designed so that with care it would also work on legacy HTML user agents as well. If you follow some simple guidelines, you can get many XHTML 1.0 documents to work in legacy browsers. However, legacy browsers only understand the media type text/html, so you have to use that media type if you send XHTML 1.0 documents to them. But be well aware, sending XHTML documents to browsers as text/html means that those browsers see the documents as HTML documents, not XHTML documents.