Under XSLT 2.0 the value of a variable declared like this:

<xsl:variable name=3D"myNumbers">
> 	  <xsl:for-each select=3D"//interestingstuff">
> 	    <xsl:sort select=3D"./@number" data-type=3D"number"
> 		order=3D"ascending" />
> 	      <xsl:copy-of select=3D"."/>
> 	    </xsl:for-each>
> 	</xsl:variable>

is a temporary tree: a document node owning zero or more
interestingStuff elements copied from the source document and sorted.

When you then do $myNumbers[1]/@number you are trying to select an
attribute of a document node, but document nodes do not have
attributes.

To get the effect you want, add as=3D"element()*" to the xsl:variable -
the value will then be a sequence of element nodes. You could also use
xsl:sequence in place of xsl:copy-of to avoid the unnecessary copying
of the elements.

If this "works" as written in Altova, then Altova has a bug.

Michael Kay




Jon Martin Solaas wrote:
> Hi,
>
> I have a general document somewhat like this:
> --------------------------------------
> <root>
> <level1>
> <level2>
> <interestingstuff number=3D"2"/>
> <interestingstuff number=3D"3"/>
> <interestingstuff number=3D"1"/>
> </level2>
> <level2>
> <interestingstuff number=3D"10"/>
> </level2>
> </level1>
> <level1>
> <interestingstuff number =3D "11"/>
> </level1>
> </root>
> --------------------------------------
>
> Now, I want to use the lowest number value from the interestingstuff
> nodes' number attribute in various places in an xslt transformation.
>
> My xslt looks like this:
> --------------------------------------
> <?xml version=3D"1.0" encoding=3D"ISO-8859-1"?>
> <xsl:stylesheet
> 	version=3D"2.0"
> 	xmlns:xsl=3D"http://www.w3.org/1999/XSL/Transform"
> 	xmlns:xs=3D"http://www.w3.org/2001/XMLSchema"
> 	xmlns:fn=3D"http://www.w3.org/2005/02/xpath-functions"
> 	xmlns:xst=3D"http://www.w3.org/2005/02/xpath-datatypes"
> 	exclude-result-prefixes=3D"xs fn xdt">
>
> <xsl:output
> 	method=3D"xml"
> 	version=3D"1.0"
> 	encoding=3D"ISO-8859-1"
> 	indent=3D"yes"/>
>
> <xsl:template match=3D"/">
>
> 	<xsl:variable name=3D"myNumbers">
> 	  <xsl:for-each select=3D"//interestingstuff">
> 	    <xsl:sort select=3D"./@number" data-type=3D"number"
> 		order=3D"ascending" />
> 	      <xsl:copy-of select=3D"."/>
> 	    </xsl:for-each>
> 	</xsl:variable>
>
> <xsl:for-each select=3D'root'>
> <MyElement>
>    <xsl:attribute name=3D"TimeStamp">
>      <xsl:value-of select=3D"$myNumbers[1]/@number"/>
>    </xsl:attribute>
> </MyElement>
> </xsl:for-each>
> </xsl:template>
> </xsl:stylesheet>
> --------------------------------------
>
> The idea is to store a sorted list of interestingstuff-nodes, that may
> occure "anywehre" in the xml, in the myNumbers variable, and then just
> pick the first one to get hold of the lowest number. Running in Altova
> XMLSpy">XMLSpy this works, but not with Oracle XML or Stylus Studio/Saxon, so I
> suppose the Altova processor is a bit too forgiving and I'm doing
> something illegal. But what?
>
> Also, as I don't need the whole sorted list of numbers, just the lowest
> one, I should find a way to store only that number in the variable. I
> suppose I'll figure that one out myself, it's spotting the error in the
> stylesheet above I just can't seem to grasp, and I really would like to
> understand what's wrong.
>=20
> --=20
> jon martin solaas
> jon_martin_solaas =A4 y-a-h-o-o...n-o