[whatwg] several messages about XML syntax and HTML5

[Martin Atkins]

Michel Fortin wrote:
> I think xmlns="http://www.w3.org/1999/html" is fine in HTML 
> because it just states what is already implied.

That's fine as long as other values of xmlns are invalid. My 
understanding of the discussion so far has basically been to allow this 
attribute but completely disregard it, which would just cause confusion 
as soon as someone tries to put a different URI in expecting it to work 
like XML.

However, allowing the addition of what is basically meaningless noise to 
a document strikes me as a little odd.