in XML files, with 0.14, i have : xmlns="http://www.freedesktop.org/standards/shared-mime-info" the problem is not the case sensitivity, it's because the page should have been renamed/moved one or more times should be http://www.freedesktop.org/Standards/shared-mime-info-spec i suppose
There's no requirement that a namespace URI can be used to download a web page. It just has to be globally unique. Changing the namespace would also break all existing applications. Marking as 'invalid'...
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