[lxml-dev] Whoops, Internal Error

[martin at martinthomas.net]

Stefan,

I can reproduce this problem on Cygwin and Fedora Core 6 which have
libxml2 2.6.26 and 2.6.26 respectively.

Sorry if I have confused things by sending that schema doc.  There are
6 different schema documents involved:
xccdf-1.1.xsd
xccdfp-1.1.xsd
xml.xsd
platform-0.2.3.xsd
cpe-1.0.xsd
simpledc20021212.xsd

They are available from nist.gov in the zip file at the URL I gave earlier.
I only attached the CPE schema because the element causing the
internal error belongs in the CPE namespace and I didn't want to
attach documents that are publicly available.

As it turns out, this is an error in libxml2.. if I use xmllint, I get  
the same error message.  I'll send them a bug report.

Thanks // M






Quoting Stefan Behnel <stefan_ml at behnel.de>:

> Hi Martin,
>
> a quick test (after renaming cpe-1.0.xsd to xccdf-1.1.xsd) didn't show any
> problem with lxml trunk and libxml2 2.6.17. Since you didn't mention any of
> the versions of lxml or libxml2 you are using, I assume it's just a problem
> with an older libxml2 version. XML-Schema is still under development in
> libxml2, so any newer version is likely to provide better support and bug
> fixes. Please upgrade and retry.
>
> Regards,
> Stefan
>
>
> Martin Thomas wrote:
>> I have attached the file to be validated and the schema that was causing
>> a problem (there are 5 more schemas involved but I didn't think you
>> needed them - either download them or ask me to email them) as well as a
>> python script that I used to create the problem.
>>
>> The output is as follows:
>> ios.xml:41:ERROR:SCHEMASV:SCHEMAV_INTERNAL: Internal error:
>> xmlSchemaIDCRegisterMatchers, Could not find an augmented IDC item for
>> an IDC definition.
>> ios.xml:41:ERROR:SCHEMASV:SCHEMAV_INTERNAL: Internal error:
>> xmlSchemaValidateElem, calling xmlSchemaValidateElemDecl().
>> ios.xml:41:ERROR:SCHEMASV:SCHEMAV_INTERNAL: Internal error:
>> xmlSchemaDocWalk, calling xmlSchemaValidateElem().
>>
>> The line number in ios.xml corresponds to a cpe-list that is defined in
>> the attached schema.  If I remove it from ios.xml, everything else
>> passes.
>>
>> Cheers // Martin
>>
>>
>>
>>  On Mon, 2007-04-30 at 11:12 -0500, martin at martinthomas.net wrote:
>>> Using the lxml rpm for FC6 and Python 2.4, I get an internal error
>>> when I try validating a document against a XMLschema document.  The
>>> xml document that I am trying to validate and the XMLschema which I am
>>> validating against both came from NIST (contained in the 'Complete
>>> 1.1.3 Schema Bundle .zip' at http://nvd.nist.gov/scap/xccdf/xccdf.cfm).
>>>
>>> The error message reads Internal error: xmlSchemaIDCRegisterMatchers,
>>> Could not find an augmented IDC item for an IDC definition.
>>>
>>> I'll write this up properly tonight and send in an error log, along
>>> with all the schema documents etc unless someone tells me otherwise.
>>>
>>> Cheers // Martin
>>>
>>> _______________________________________________
>>> lxml-dev mailing list
>>> lxml-dev at codespeak.net
>>> http://codespeak.net/mailman/listinfo/lxml-dev
>>>
>>> ------------------------------------------------------------------------
>>>
>>> from lxml import etree
>>>
>>> xsd = etree.ElementTree(file='xccdf-1.1.xsd')
>>>
>>> doc = etree.ElementTree(file='ios.xml')
>>>
>>> xsv = etree.XMLSchema(xsd)
>>> try:
>>>     xsv.validate(doc)
>>> except Exception, e:
>>>     pass
>>>
>>> print e.error_log
>>>
>>> ------------------------------------------------------------------------
>>>
>>> _______________________________________________
>>> lxml-dev mailing list
>>> lxml-dev at codespeak.net
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>