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

[Csaba Raduly <rcsaba gmail com>]

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
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