Re: [xml] Catching error messages in schematron

On Thu, Aug 02, 2007 at 01:52:05PM +0200, Stefan Behnel wrote:
Hi Daniel,

Daniel Veillard wrote:
On Thu, Jul 19, 2007 at 08:03:24PM +0200, Stefan Behnel wrote:
currently (as of libxml2 2.6.29), the schematron implementation writes
validation error messages to stderr with a plain fprintf in
xmlSchematronReportOutput (happily annotated with a "TODO").

However, to make schematron usable in lxml, I need a way to propagate these
errors to the Python level. I would therefore like to see them passed into

  The schematron code is really not complete, that sure could be fixed
but a lot more may be needed. I asked for a definitive set of test for
the ISO version and never got an answer, so I got discouraged and dropped
working on it at the time. Of course now I have far less time for libxml2

Ah, that's too bad. Can you comment on how complete you consider the current
Schematron implementation?

  I would like to be able to answer. But 1/ first I don't fully remember
2/ I added support only for XPath1 tests, and the last version I saw
had support for XSLT1/2, I don't know how much is required to be
conformant, and if XSLT is needed, then the schematron support can't be
implemented within libxml2 (since it would depend on libxslt).
Basically I implemented based on a public spec, then it went to ISO
and now I don't have a test suite and it seems the final version 
doesn't look 100% like what I used for the implementation 
   One think missing in the implementation is include support, that's
for sure.


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Daniel Veillard      | virtualization library
veillard redhat com  | libxml GNOME XML XSLT toolkit | Rpmfind RPM search engine

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