RE: [xsl] resolveQName and xpath-default-namespace

["Michael Kay" <mike@xxxxxxxxxxxx>]

I replied to your original posting at
http://p2p.wrox.com/topic.asp?TOPIC_ID=19710 Unfortunately there is an error
in the book here, and also an error in the Saxon implementation; more
embarrassingly still, the two errors are different. This is only partially
excused by the fact that the spec was changed at some stage.

The answer to your final question is yes: if an xpath-default-namespace is
in force, then there is no way to select elements in no namespace. But you
can reset it, for any region of the stylesheet, by putting
xpath-default-namespace="" on any XSLT element.

Michael Kay

 

> -----Original Message-----
> From: Joe Fawcett [mailto:joefawcett@xxxxxxxxxxx] 
> Sent: 29 September 2004 09:50
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject: [xsl] resolveQName and xpath-default-namespace
> 
> With source doc:
> 
> <doc xmlns:one="one.uri" xmlns="default.uri">
>   <chap xmlns="" att-one="text">
>     <data-one>one:value</data-one>
>     <data-two>value</data-two>
>   </chap>
> </doc>
> 
> I tried the following stylesheet:
> 
> 
> <xsl:stylesheet
>    version="2.0"
>    xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
>    xmlns:one="one.uri"
>    xmlns:def="default.uri">
> 
> <xsl:output method="text" indent="yes"/>
> 
> <xsl:variable name="doc" select="/def:doc"/>
> <xsl:variable name="chap" select="/def:doc/chap"/>
> <xsl:variable name="data1" select="/def:doc/chap/data-one"/>
> <xsl:variable name="data2" select="/def:doc/chap/data-two"/>
> 
> <xsl:template match="/">
>   <xsl:variable name="res0" 
> select="resolve-QName($chap/@att-one, $doc)"/>
>   {<xsl:value-of 
> select="namespace-uri-from-QName($res0)"/>}<xsl:value-of 
> select="local-name-from-QName($res0)"/><xsl:text>#xa;</xsl:text>
>   <xsl:variable name="res1" 
> select="resolve-QName($chap/@att-one, $chap)"/>
>   {<xsl:value-of 
> select="namespace-uri-from-QName($res1)"/>}<xsl:value-of 
> select="local-name-from-QName($res1)"/><xsl:text>#xa;</xsl:text>
>   <xsl:variable name="res2" 
> select="resolve-QName(string($data1), $data1)"/>
>   {<xsl:value-of 
> select="namespace-uri-from-QName($res2)"/>}<xsl:value-of 
> select="local-name-from-QName($res2)"/><xsl:text>#xa;</xsl:text>
>   <xsl:variable name="res3" 
> select="resolve-QName(string($data2), $data2)"/>
>   {<xsl:value-of 
> select="namespace-uri-from-QName($res3)"/>}<xsl:value-of 
> select="local-name-from-QName($res3)"/><xsl:text>#xa;</xsl:text>
> </xsl:template>
> </xsl:stylesheet>
> 
> 
> against the doc shown above. I get:
>   {}text
> 
>   {}text
> 
>   {one.uri}value
> 
>   {}value
> 
> I don't understand why resolve-QName($chap/@att-one, $doc) 
> doesn't resolve 
> 'value' to {one.uri}value when $doc is used for the resolving 
> node as it has 
> 'one' mapped to 'one.uri'.
> 
> then I tried adding xpath-default-namespace="default-uri" and 
> removing the 
> def: prefix from the variables declarations and the 
> stylesheet namespace 
> declaration. This led to an error indicating that 
> $chap/@att-one was an 
> empty sequence. I presume this is something to do with the 
> default namespace 
> being undeclared. The full stylesheet:
> 
> 
> <xsl:stylesheet
>    version="2.0"
>    xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
>    xmlns:one="one.uri"
>    xpath-default-namespace="default.uri">
> 
> <xsl:output method="text" indent="yes"/>
> 
> <xsl:variable name="doc" select="/doc"/>
> <xsl:variable name="chap" select="/doc/chap"/>
> <xsl:variable name="data1" select="/doc/chap/data-one"/>
> <xsl:variable name="data2" select="/doc/chap/data-two"/>
> 
> <xsl:template match="/">
>   <xsl:variable name="res0" 
> select="resolve-QName($chap/@att-one, $doc)"/>
>   {<xsl:value-of 
> select="namespace-uri-from-QName($res0)"/>}<xsl:value-of 
> select="local-name-from-QName($res0)"/><xsl:text>#xa;</xsl:text>
>   <xsl:variable name="res1" 
> select="resolve-QName($chap/@att-one, $chap)"/>
>   {<xsl:value-of 
> select="namespace-uri-from-QName($res1)"/>}<xsl:value-of 
> select="local-name-from-QName($res1)"/><xsl:text>#xa;</xsl:text>
>   <xsl:variable name="res2" 
> select="resolve-QName(string($data1), $data1)"/>
>   {<xsl:value-of 
> select="namespace-uri-from-QName($res2)"/>}<xsl:value-of 
> select="local-name-from-QName($res2)"/><xsl:text>#xa;</xsl:text>
>   <xsl:variable name="res3" 
> select="resolve-QName(string($data2), $data2)"/>
>   {<xsl:value-of 
> select="namespace-uri-from-QName($res3)"/>}<xsl:value-of 
> select="local-name-from-QName($res3)"/><xsl:text>#xa;</xsl:text>
> </xsl:template>
> 
> </xsl:stylesheet>
> 
> 
> 
> This didn't work either, does that mean once I have used the 
> xpath-default-namespace I can't select this sort of element 
> (no namespace)?
> 
> 
> I am using Saxon 8 basic.
> 
> --
> 
> Joe
> 
> PS (to Michael Kay - I tried posting to Saxon list at 
> SourceForge but was 
> not able to subscribe as I never received a confirmation email)