On Sun, 28 Aug 2011 19:45:50 +0200, Jukka K. Korpela <[email protected]>
wrote:
28.8.2011 17:52, Aryeh Gregor wrote:
"Void" is correct:
http://www.whatwg.org/specs/web-apps/current-work/multipage/syntax.html#void-elements
I see. What a pointless and confusing change (from HTML tradition and
SGML usage). "Empty" is descriptive (an element that has no content, or
has empty content), whereas "void" suggests associations like "null and
void" or "void pointer". This is about elements that are very real and
meaningful, instead of being "void" in any normal meaning - they just
express everything they can express by their name and attributes
<p></p> is an empty element since it has no content, but p is not a void
element.
Maybe void isn't a great term, but empty isn't either.
Documents served with a text/html MIME type must obey the HTML syntax
rules, not XHTML. I couldn't find where the spec says this
normatively, but there's an informative note at the top of the HTML
syntax and XHTML syntax sections.
So does this mean that the rules are, after all, different for HTML
serialization than for XHTML serialization?
After all? They have always been different...
If you're serving a document with an XML MIME type,<foo></foo> is
equivalent to <foo /> for any value of foo. The validator won't
distinguish and neither will UAs, so use whichever you please.
They're entirely different with an HTML MIME type, and that cannot be
changed at this point due to compatibility.
Is there any way to tell validator.nu or the W3C Validator in HTML5 mode
to apply XHTML rules when submitting a document via a text field or via
file upload?
In http://validator.nu/ you can choose "XML" or "HTML" under Parser.
Is there any requirement on such a distinction?
About what?
When validating via URL, the W3C Validator (in HTML5 mode) indeed
accepts <p /> when Content-Type: application/xhtml+xml. However,
validator.nu responds:
IO Error: Non-HTML Content-Type: application/xhtml+xml.
This is getting rather confusing...
I guess you chose the "HTML5" parser in validator.nu, which will not
accept an XML MIME type (you need the XML parser for XML). I think the W3C
validator doesn't have a way to choose between XML and HTML in "HTML5
mode", it will decide from the MIME type (dunno what it does for file
upload).
--
Simon Pieters
Opera Software
