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RE: resolveQName and xpath-default-namespace

Subject: RE: resolveQName and xpath-default-namespace
From: "Michael Kay" <mike@xxxxxxxxxxxx>
Date: Wed, 29 Sep 2004 11:47:06 +0100
xpath default namespace
Yes, that's the Saxon error.

IIRC, I got the fix for this into the final build of Saxon 8.1 - try it
again.

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

> -----Original Message-----
> From: Joe Fawcett [mailto:joefawcett@xxxxxxxxxxx] 
> Sent: 29 September 2004 11:11
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject: RE:  resolveQName and xpath-default-namespace
> 
> Thanks Michael, I read your reply. This was a follow on, I 
> still 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'.
> Is that the Saxon error you meant? If so, fine, I just wanted 
> to make sure I 
> had understood properly how the function is supposed to work.
> I didn't mean to criticise Saxon at all, it's a fantastic 
> product and it 
> looks like our company is going to buy the schema aware version too.
> 
> 
> Thanks for all your help.
> 
> Joe
> 
> 
> >From: "Michael Kay" <mike@xxxxxxxxxxxx>
> >Reply-To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> >To: <xsl-list@xxxxxxxxxxxxxxxxxxxxxx>
> >Subject: RE:  resolveQName and xpath-default-namespace
> >Date: Wed, 29 Sep 2004 10:25:28 +0100
> >
> >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:  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)

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