On Wed, 14 Mar 2007 11:40:04 +0100, Thomas Broyer <[EMAIL PROTECTED]>
wrote:
How about this variation:
<head xml:base="bar/">
<base href="foo/" />
</head>
Is the [EMAIL PROTECTED] resolved to absolute using [EMAIL PROTECTED]:base or
not?
I'd say it is. At least according to XML Base. The HTML specification can
of course state otherwise, but the smartest thing to do would be to not
break 'xml:base' processing rules in HTML, even if <base> is a special
case element.
If it is, then when looking at links inside head, relative URIs are
resolved using a base of "bar/foo/bar/" (taking [EMAIL PROTECTED]:base into
account twice: once to resolve [EMAIL PROTECTED], which sets the document's
base URI, and then relative to that base URI to resolve [EMAIL PROTECTED]'s).
Hm, that sounds weird. I'd say once [EMAIL PROTECTED] is resolved (taking into
account the parent xml:base URI), then that's final. Any xml:base's after
<base>'s presence will override the base, but I don't see a reason for
applying xml:base twice. Since <base> is a special case element that
magically affects all URI's in the document, I'd say it works like that
even when combined with 'xml:base'.
If it is not, then <base> is in violation of the xml:base spec AFAICT.
It's even worse if 'xml:base' doesn't apply to <base> at all, but I'd say
apply the parent base URI, then apply that URI to all elements in the
document (until another 'xml:base' is encountered).
I'd personally only allow absolute URI references in [EMAIL PROTECTED]
+1.
We still have to cope with legacy content which uses a relative URI,
but then they're likely not XHTML, so xml:base is simply ignored.
I'd actually vote for the exclusion of <base> from XHTML entirely. We have
xml:base, so use that instead.
This could be solved by saying that if there is an xml:base in scope,
then <base> is ignored for the whole document.
That's also a solution, yea.
A quick test with Firefox shows that xml:base is applied but <base>
seems to be ignored in application/xhtml+xml documents.
Sounds like good behaviour.
--
Asbjørn Ulsberg -=|=- http://virtuelvis.com/quark/
«He's a loathsome offensive brute, yet I can't look away»
