[xml] Re: [libxml] xmllint misses namespace bug?

[Tobias Reif <tobiasreif pinkjuice com>]

Daniel Veillard wrote:

> [ Cc'ing the mailing list, I don't see why this wasn't sent there ! ]


... because I wanted to check first if it's a known bug, and if it 
isn't, submit a bug report in the bugzilla.

I can understand that you don't want people to email libxml related 
stuff to you directly, but I don't think it's *ever* appropriate to post 
contents of private emails to public lists. But in this case it doesn't 
matter much.

Anyways: Please accept my apologies for bothering you directly. I'll 
exclusively use the list or/and bugzilla in the future.


> On Thu, Jul 03, 2003 at 09:57:46PM +0200, Tobias Reif wrote:
>
> >   xmlns:="http://www.w3.org/2000/svg";
> >
> > Note the colon after "xmlns" in line 6.
> >
> > Xerces:
> >
> > Error at file C:\tmp\colon_attr_name.txt.743259, line 6, char 10
> >   Message: Attribute 'xmlns:' is not declared for element 'svg'
> >
> > latest Window version
> > libxml2-2.5.7.win32\util\xmllint
> >
> > xmllint --noout --valid --catalogs colon_attr_name.txt
> >
> > => no error raised
>   Your document is a correct XML-1.0 document.


It may be well-formed, but I don't think zero-length prefixes are legal.
http://www.w3.org/TR/REC-xml-names/#ns-decl
  [2] PrefixedAttName  ::= 'xmlns:' NCName
http://www.w3.org/TR/REC-xml-names/#NT-NCName
  [4] NCName  ::= (Letter | '_') (NCNameChar)*

> The parser will not raise a well formed error.


If xmllint is namespace-aware, it might make sense to raise an error for 
zero-length prefixes.

> It probably should raise a validity error


For sure.


> and that may be a bug but it depends on the DOCTYPE since it's unlikely
> taht an "xmlns:" attribute was defined in the SVG DTD.


Exactly. In addition to probably violating the namespaces spec, the 
document is invalid in respect to the referenced DTD.

> Please check this first and log the bug in bugzilla


Alright.


Tobi

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