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Re: [xml-dev] Polyglot XHTML5 Validator?

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:
> The above is valid HTML5, it is well-formed even if the top-element is
> lower-case, but the Polyglot Spec explicitly says:
> "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.



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