Re: [xml] Is ignoring namespace and DTDs an xmllint or libxml2 problem?

["Eric S. Eberhard" <eric vicsmba com>]

One thing you can do is make some of these arguable changes set by 
runtime flags.  I do so much code with little tiny companies sending 
in orders ... and ALWAYS messing up the capitalization ... and being 
unable to deal with namespaces and validation (often they make a 
spread sheet and output as XML) ... I have enabled an option to check 
the tags regardless of capitalization ... useful in some cases (I 
don't always enable it).  Just thinking ... E

At 06:17 AM 1/26/2012, Daniel Veillard wrote:
> On Sat, Jan 07, 2012 at 06:54:22PM +0100, Michael Ludwig wrote:
> > Thomas Gagne schrieb am 06.01.2012 um 11:47 (-0500):
> > > I'm unclear how I can reformat the file
> > >
> > >    tgagne ubuntu:~/tmp$ cat a.xml
> > >    <ns:a>
> > >    </ns:a>
> > >
> > > without getting the errors
> > >
> > >    tgagne ubuntu:~/tmp$ xmllint --format --recover a.xml
> > >    a.xml:1: namespace error : Namespace prefix ns on a is not defined
> > >    <ns:a>
> > >          ^
> > >
> > > Is it a problem with xmllint or libxml2?
> >
> > These days most would say it's a problem with your XML, which is not
> > namespace-valid.
>
>   yes but it should *just* raise the namespace error which it does, but
> should not generate information loss.
>
> > Then, my copy of xmllint (Windows, 20707) reformats the doc alright, it
> > just also emits the warning you're seeing and, significantly, drops the
> > part of the name before the colon.
> >
> > You'd need a parser configuration that has namespaces switched off. That
> > should be available as "xmllint --sax1" (the old SAX 1 didn't know about
> > namespaces), but even then xmllint emits the warning and drops the part
> > before the colon, which I think is a bug.
>
>   SAX1 parser is namespace aware just that the callback API isn't.
>
> I hate the idea of information loss in the context of XML processing
> and since support for XML Namespace is still an optional feature
> I fixed the SAX2 default callbacks to not loose the prefix in this
> case or if an attribute uses an undefined namespace. SAX2 should be
> fixed both in case of using a parser dictionnary or not.
>
>   I will push the patches once I'm off the train ;-)
>
> Daniel
>
> --
> Daniel Veillard      | libxml Gnome XML XSLT toolkit  http://xmlsoft.org/
> daniel veillard com  | Rpmfind RPM search engine http://rpmfind.net/
> http://veillard.com/ | virtualization library  http://libvirt.org/
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Eric S. Eberhard
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