[XSL-LIST Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message]

Re: Fundimentle Predicate Problem or Bug??

Subject: Re: Fundimentle Predicate Problem or Bug??
From: Ronan Klyne <ronan.klyne@xxxxxxxxxxx>
Date: Wed, 17 Sep 2008 15:03:07 +0100
Re:  Fundimentle Predicate Problem or Bug??
Chris Hughes wrote:
> 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 &gt;= '2008-01-01' and FixtureDate &lt;= '2010-01-01' and
>                                                     Race/RaceType &gt;= 'R' and Race/RaceType &lt;= '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 &gt;= '2008-01-01' and FixtureDate &lt;= '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
> 

In your first solution, Race/Racetype is a set of two values, 'S', and
'H'. The tricky bit is in how your tests apply to sets.

When the right hand side is a set, the tests "'R' <= ...." and "'R' >=
...." both return true if 'R' is <= _any_ element of the set or >= _any_
element of the set.
The first test matches 'S' and the second test matches 'H'

	# r

-- 
Ronan Klyne
Business Collaborator Developer
Tel: +44 01189 028518
ronan.klyne@xxxxxxxxxxx
www.groupbc.com

Current Thread

PURCHASE STYLUS STUDIO ONLINE TODAY!

Purchasing Stylus Studio from our online shop is Easy, Secure and Value Priced!

Buy Stylus Studio Now

Download The World's Best XML IDE!

Accelerate XML development with our award-winning XML IDE - Download a free trial today!

Don't miss another message! Subscribe to this list today.
Email
First Name
Last Name
Company
Subscribe in XML format
RSS 2.0
Atom 0.3
Site Map | Privacy Policy | Terms of Use | Trademarks
Free Stylus Studio XML Training:
W3C Member
Stylus Studio® and DataDirect XQuery ™are products from DataDirect Technologies, is a registered trademark of Progress Software Corporation, in the U.S. and other countries. © 2004-2013 All Rights Reserved.