Your stylesheet says version="2.0" but are you actually using an XSLT 2.0
processor? If you give this to a 1.0 processor it will treat FixtureDate
<= '2010-01-01' as a numeric comparison, convert the date to the number
NaN, and return false because all comparisons with NaN are false.
Even with a 2.0 processor it would be more robust to do a date comparison
rather than a string comparison - string collations can play funny tricks
with hyphens.
Michael Kay
http://www.saxonica.com/
-----Original Message-----
From: Chris Hughes [mailto:chris_hughes22(_at_)yahoo(_dot_)co(_dot_)uk]
Sent: 17 September 2008 14:53
To: xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
Subject: [xsl] Fundimentle Predicate Problem or Bug??
Hi
I tried asking for help a while back on this, anyway now I
have worked out exactly where my issue is and will provide
examples below.
Assume this data....
<?xml version="1.0" encoding="utf-8"?>
<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 >=
'2008-01-01' and FixtureDate <= '2010-01-01' and
Race/RaceType >= 'R' and Race/RaceType <= 'R']" >
<xsl:message><xsl:value-of select="FixtureDayText"/></xsl:message>
</xsl:for-each>
</xsl:template>
</xsl:stylesheet>
Stylesheet 2
------------
This stylesheet outputs nothing - which is what I would
expect, but essentially is stylesheet 1 not performing the
same logic as 2?
<?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 >=
'2008-01-01' and FixtureDate <= '2010-01-01' and
Race/RaceType = 'R']" >
<xsl:message><xsl:value-of select="FixtureDayText"/></xsl:message>
</xsl:for-each>
</xsl:template>
</xsl:stylesheet>
Conclusion
-----------
Like so many of us working in the XML / XSLT world I find it
difficult to adjust to a different way of working.
Essentially had I wrote this logic in SQL or 4GL or VB etc
etc I'd be sure that it would work. I hope nobody is
offended by me suggesting this may be a bug!
Thanks in advance.
Chris
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