2.3.3.18 xmlns
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Declares a namespace for custom tags in an HTML document.
The xmlns attribute is declared in markup only.
See also namespace.
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Quirks Mode, IE7 Mode, IE8 Mode, IE9 Mode, IE10 Mode, IE11 Mode, and EdgeHTML Mode (All Versions)
Declares a namespace for custom tags in an HTML document.
The xmlns attribute is declared in markup only.
See also namespace.