Re: [xml] Possible bug with schema validation in combination with xsi:nil

[Thomas Gamper <icicle cg tuwien ac at>]

Am 07.02.2013 17:56, schrieb Csaba Raduly:
> On Thu, Feb 7, 2013 at 4:47 PM, Thomas Gamper  wrote:
> > Hi!
> >
> > I ran into issues with libxml2 xml validation with schemas as soon as i
> > started using the xsi:nil attribute. Attached you find a reduced version of
> > the schema I am using (zenotrack-pilot.xsd + all the dependencies it needs)
> > and two test cases:
> >
> > GetNextMessageResponse.xml which does not validate with with xmllint
> > (xmllint --schema zenotrack-pilot.xsd GetNextMessageResponse.xml)
> > GetMessagesResponse, which is extremely similar to the first testcase, but
> > does validate with xmllint (xmllint --schema zenotrack-pilot.xsd
> > GetMessagesResponse.xml)
> >
> > I did try libxml2 2.7.7, 2.7.8 and 2.9.0. I did a debug build of libxml2
> > 2.9.0 on Win64 and stepped with the debugger through the code, but it is
> > simply to complex for me to understand what is actually going on. All I saw
> > was that the nil attribute was recognized as such, but later one validation
> > failed for reasons I do not understand.
> >
> > Probably I am not seeing the obvious, but still I would like to ask for help
> > if there is actually something wrong with libxml2 in this case.
> It is almost certainly a bug in libxml2: I tried your files with a
> validator based on Xerces-C and both passed.
>
> Csaba
The validator integrated into Visual Studio seems to validate both files 
fine too.

Thanks,
TOM