Re: [xsl] Fundimentle Predicate Problem or Bug??

[Martin Honnen <Martin.Honnen@xxxxxx>]

Chris Hughes wrote:

> <ORCB082>
>    <ROWSET>
>       <ROW num="1">
>         <Fixture>
>             <FixtureDate>2008-10-17</FixtureDate>
>             <FixtureDayText>DAY ONE TEST</FixtureDayText>
>             <Race>
>                <RaceType>S</RaceType>
>             </Race>
>             <Race>
>                <RaceType>H</RaceType>
>             </Race>
>          </Fixture>
>       </ROW>
>    </ROWSET>
> </ORCB082>
>
>
> Stylesheet 1
> ------------
>
> This stylesheet outputs "DAY ONE TEST" message, IMO it should match no records and not output anything.
>
> <?xml version="1.0"?> 
>   <xsl:stylesheet version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
>                                 xmlns:xs="http://www.w3.org/2001/XMLSchema";>
>   <xsl:output method="text" indent="yes"/> 
>
>   <xsl:template match="/">
>
>   <xsl:for-each select="/ORCB082/ROWSET/ROW/Fixture[FixtureDate &gt;= '2008-01-01' and FixtureDate &lt;= '2010-01-01' and
>                                                     Race/RaceType &gt;= 'R' and Race/RaceType &lt;= 'R']" >

Race/RaceType >= 'R' is true for the <RaceType>S</RaceType> element, 
Race/RaceType <= 'R' is true for the <RaceType>H</RaceType>.

So the result you see is a consequence of >= or <= applied to node-set 
operands (in XPath 1.0) or sequence operands (in XPath 2.0) being true 
if there is at least one item in each operand node-set/sequence for 
which the comparison is true.


--

	Martin Honnen
	http://JavaScript.FAQTs.com/