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Re: [xml-dev] Using Saxon 9 as a Schematron 1.5 back end

Hi Henri,

An XSLT 2.0 processor is also a perfectly good XSLT 1.0 processor for 
the large majority of use cases. The incompatibilities between XSLT 2.0 
in backwards compatible mode and XSLT 1.0 are detailed here:


BTW the reason Saxon doesn't have column numbers in error messages is 
because you can only get very limited location information back from a 
standard SAX parser. I presume Xalan has it's own customized XML parser 
in order to do what it does.


Henri Sivonen wrote:
> Validator.nu uses a patched version of oNVDL with Xalan as its 
> Schematron 1.5 back end. I switched from Saxon 6 to Xalan in order to 
> get column numbers in addition to line numbers on errors. However, I'm 
> not happy with the performance of Xalan, which is why I'm considering 
> going back to Saxon. To do that without feature loss, I need to patch 
> Saxon to support column numbers.
> Should I put my effort into patching Saxon 6 or 9? That is, can I use 
> Saxon 9 without breaking the semantics of Schematron 1.5 schemas that 
> use XPath 1.0 queries?
> --Henri Sivonen
> hsivonen@iki.fi
> http://hsivonen.iki.fi/
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John Snelson, Oracle Corporation            http://snelson.org.uk/john
Berkeley DB XML:        http://www.oracle.com/database/berkeley-db/xml
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