- From: Michael A. Puls II <shadow2531@gmail.com>
- Date: Wed, 1 Aug 2007 00:35:08 -0400
- To: "Ben Boyle" <benjamins.boyle@gmail.com>
- Cc: "HTML WG" <public-html@w3.org>
On 7/30/07, Ben Boyle <benjamins.boyle@gmail.com> wrote: > > http://dev.w3.org/html5/spec/Overview.html#the-root > > This seems fine to me. > > Unsure about the second note: doesn't xmlns="" put an element into the > "null" namespace in XML? Not sure this note is even needed, maybe it > should say: In XML serialisations all elements must be declared in the > "http://www.w3.org/2000/xmlns/" namespace. FWIW, I think of it like this: When HTML5 markup served as text/html is parsed into the DOM, all elements end up in the "http://www.w3.org/1999/xhtml" namespace. All attributes end up in no namespace (the "null namespace"). For example, in each of these situations, the element is in the "http://www.w3.org/1999/xhtml" namespace and each attribute (including xmlns) is in the "null" namespace. <html class="foo"> <html xmlns="http://www.w3.org/1999/xhtml" class="foo"> <html xmlns="foo" class="foo"> For XHTML5 markup (XML markup served as application/xhtml+xml or application/xml, with a root element of "html", with an xmlns attribute that has the value of "http://www.w3.org/1999/xhtml"), the HTML element is in the "http://www.w3.org/1999/xhtml" namespace, child elements of the HTML element are in the "http://www.w3.org/1999/xhtml" namespace by default, attributes prefixed with "xml:" are in the "http://www.w3.org/XML/1998/namespace" namespace, the xmlns attribute is in the "http://www.w3.org/2000/xmlns/" namespace and non-prefixed attributes are in the default namespace of "". For example, in the following situation, the xmlns attribute is in the "http://www.w3.org/2000/xmlns/" namespace, the html element is in the "http://www.w3.org/1999/xhtml" namespace, the id attribute is in the "http://www.w3.org/XML/1998/namespace" namespace and the title attribute is in the default namespace of "". <html xmlns="http://www.w3.org/1999/xhtml" xml:id="test" title="test"> -- Michael
Received on Wednesday, 1 August 2007 04:35:17 UTC