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RE: [xsl] question on variable definition

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This is an error in XSLT 1.0, but permitted in 2.0.

The relevant 1.0 rule is in section 11.5:

It is an error if a binding established by an xsl:variable or xsl:param
element within a template shadows another binding established by an
xsl:variable or xsl:param element also within the template.

Regards,

Michael Kay
http://www.saxonica.com/
http://twitter.com/michaelhkay 


> -----Original Message-----
> From: Hermann Stamm-Wilbrandt [mailto:STAMMW@xxxxxxxxxx] 
> Sent: 30 March 2010 12:33
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject: [xsl] question on variable definition
> 
> 
> Hello,
> 
> xsltproc complains about redefining variable v with an error.
> saxon9he has no complaints and does a rewrite(?) of the variable.
> 
> From the spec:
> http://www.w3.org/TR/xslt#variables
> 
> For any use of these variable-binding elements, there is a 
> region of the stylesheet tree within which the binding is 
> visible; within this region, any binding of the variable that 
> was visible on the variable-binding element itself is hidden. 
> Thus, only the innermost binding of a variable is visible. 
> The set of variable bindings in scope for an expression 
> consists of those bindings that are visible at the point in 
> the stylesheet where the expression occurs.
> 
> So saxon9he seems to assue the second definition of v as 
> innermost binding, while xsltproc seems to see both on the 
> same binding level.
> What is the spec conforming behavior?
> 
> $ xsltproc -version
> Using libxml 20626, libxslt 10117 and libexslt 813 xsltproc 
> was compiled against libxml 20626, libxslt 10117 and libexslt 
> 813 libxslt 10117 was compiled against libxml 20626 libexslt 
> 813 was compiled against libxml 20626 $ xsltproc m.xsl m.xsl 
> runtime error: file m.xsl line 8 element variable 
> xsl:variable : redefining v no result for m.xsl $ java -jar 
> saxon9he.jar -xmlversion:1.0 -xsl:m.xsl -s:m.xsl 
> -versionmsg:off ; echo <?xml version="1.0" 
> encoding="UTF-8"?>12 $ $ cat m.xsl <xsl:stylesheet version="1.0"
>   xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
> >
>   <xsl:template match="/">
> 
>     <xsl:variable name="v" select="1"/>
>     <xsl:value-of select="$v"/>
>     <xsl:variable name="v" select="2"/>
>     <xsl:value-of select="$v"/>
> 
>   </xsl:template>
> </xsl:stylesheet>
> $
> 
> 
> Mit besten Gruessen / Best wishes,
> 
> Hermann Stamm-Wilbrandt
> Developer, XML Compiler, L3
> WebSphere DataPower SOA Appliances
> ----------------------------------------------------------------------
> IBM Deutschland Research & Development GmbH Vorsitzender des 
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