Schematron & XPath 2.0 string/numeric comparisons

[XedMada]

I recently added queryBinding="xslt2" to my Schematron so I could use XPath 2.0. After doing so, it seems all of my assertion tests containing comparisons of > or < are having issues (reporting incorrectly.) It seems inequality tests are not working out.

e.g.
schema:

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<pattern id="limit_order">

	<rule context="foo" role="error">

		<assert test="not(@l_lim > @h_lim)">

			Limits must be in high/low order.</assert>

	</rule>

</pattern>

samples:

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<foo l_lim="50" h_lim="255" />

fails

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<foo l_lim="200" h_lim="255" />

passes

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<foo l_lim="050" h_lim="255" />

passes


Specifying the attributes as numbers seems to resolve the issue:

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<pattern id="limit_order">

	<rule context="foo" role="error">

		<assert test="not(number(@l_lim) > number(@h_lim))">

			Limits must be in high/low order.</assert>

	</rule>

</pattern>

All previous examples pass.

I understand the notion of string vs. numeric comparison, but I thought this was taken care of for you since it worked before adding xslt2 to the schema. Is this a bug, am I missing something, or must I add number() all over my schema?

cheers,
-X

[XedMada]

Sorry, forgot to mention: OSX 10.6.6 & oXygen Editor 12.1 build 2011012011

[george]

This is how it works in XPath 2.0.
See http://www.w3.org/TR/xpath20/#id-general-comparisons
The case when XPath 1.0 compatibility mode is false
***
a. If both atomic values are instances of xs:untypedAtomic, then the values are cast to the type xs:string.
***

Best Regards,
George