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Editorial Team
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Asked: 2026-05-30T20:12:51+00:00

The question is simple: Can Polyglot Markup be served with the content-type: text/html+xml; charset=utf-8

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The question is simple:
Can Polyglot Markup be “served” with the content-type: text/html+xml; charset=utf-8?

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1 Answer

  1. Editorial Team

    Any content can be served with any content type. What the receiver makes of it is another matter.

    text/html+xml is not a registered MIME type although browsers should treat it as XML according to the HTML5 spec

    When a document is transmitted with an XML MIME type, such as
    application/xhtml+xml, then it is treated as an XML document by Web
    browsers, to be parsed by an XML processor.

    and

    The term XML MIME type is used to refer to the MIME types text/xml,
    application/xml, and any MIME type whose subtype ends with the four
    characters “+xml”. [RFC3023]

    The real question is why would you want to do this when there are registered MIME types available for the purpose?

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