Wait a sec. By far the most widely used half-assed solution to namespaces is in the HTML5 parser to special case svgs (and maybe other curiosities? Dunno). And

Wait a sec. By far the most widely used half-assed solution to namespaces is in the HTML5 parser to special case svgs (and maybe other curiosities? Dunno). And if I understand correctly, that happens to be a full-assed specified algorithm that all current browsers use. That is all in order to avoid the problems that would have come with requiring the full-assed XML namespaces in that case. If I were a political operative, I would attempt to bog down the XML apologists on this point whenever they attempt to argue that JSON gets as complicated as XML when you try to include namespaces.