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Editorial Team
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Asked: 2026-05-15T18:16:36+00:00

How can I add new tags to the xhtml document without making the markup

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How can I add new tags to the xhtml document without making the markup ‘invalid’?

for eg:

instead of <span class="time"> I’d like to use <time>. Is this possible? because I’ve seen a facebook app do something like this.

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1 Answer

  1. Editorial Team

    You need to declare a new namespace for your invented elements:

    <html xmlns:foo="urn:my-namespace">
...
<foo:time>...</foo:time>

    or

    <html>
...
<time xmlns="urn:my-namespace">...</time>

    Of course, this isn’t going to make an ounce of sense to your browser but I presume you have good reasons to want to do this.

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