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Re: [xml-dev] Polyglot XHTML5 Validator?
- From: David Carlisle <davidc@nag.co.uk>
- To: Jesper Tverskov <jesper.tverskov@gmail.com>
- Date: Tue, 24 May 2011 10:37:04 +0100
On 24/05/2011 10:20, Jesper Tverskov wrote:
> That we need to use the title element in the head section is not only
> BEST PRACTICE, which I have learned is out of scope in this context,
> but the spec actually says:
>
> 6.1 Required Elements
> "Every polyglot markup document contains an html, head, title, and
> body element."
>
polyglot elements are by definition valid html, so will have a title,
but that doesn't need to be checked by this schematron.
> We _need_ an assertion for DOCTYPE. You forgot that we can have a
> DOCTYPE looking like the following:
> <!DOCTYPE HTML>
>
> The above is valid HTML5, it is well-formed even if the top-element is
> lower-case, but the Polyglot Spec explicitly says:
>
> 4. DOCTYPE
> "The string html is in lowercase letters."
>
grr I suppose so, I currently say that the input has to be valid html
and well formed xml. It would be tempting to say it had also to be
valid xml using a catalog supplying some minimal dtd (which would also
ensure no entity references were used) but unfortunately using a catalog
for that form requires a optional feature of the xml catalog spec
(defaulting a dtd based on top level element name)
Most likely though I should document this as a restriction rather that
change the schematron, it's not reliable to reload the same document via
unparsed-text (the original document may not be available if for example
it was originally supplied as a stream on standard input.)
again, the polyglot spec is wrong to make this requirement (as html/xml
parsing is not affected, which is why it is hard to check it with
schematron) so perhaps the correct fix here is to enter a bug on the spec.
David
David
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