From the new working draft of XHTML 1.1:
XHTML 1.1 documents SHOULD be labeled withthe Internet Media Type
text/html as defined
in [RFC2854]
Which says:
In addition, [XHTML1] defines a profile of use
of XHTML which is compatible with HTML 4.01 and
which may also be labeled as text/html.
... making no mention of XHTML 1.1.
or application/xhtml+xml as definedin [RFC3236]. For further information
on using
media types with XHTML, see the informative
note [XHTMLMIME].
Which says:
In general, this media type is NOT suitable for
XHTML.
and
The use of 'text/html' for XHTML SHOULD be limited
for the purpose of rendering on existing HTML user
agents, and SHOULD be limited to [XHTML1] documents
which follow the HTML Compatibility Guidelines.
and to paraphrase the summary tables:
XHTML 1.1 SHOULD NOT be served as text/html
Additionally, as far as I know, nothing added in XHTML 1.1 (i.e. Ruby
annotation) is supported by legacy user agents. So there seems little
point in allowing it to be served as text/html.
I propose the following change:
XHTML 1.1 documents SHOULD be labeled with the Internet Media Type
application/xhtml+xml as defined in [RFC3236]. They SHOULD NOT be labeled
with the Internet Media Type text/html as defined in [RFC2854]. For
further information on using media types with XHTML, see the informative
note [XHTMLMIME].
--
David Dorward <http://dorward.me.uk/>