On Sun, Sep 08, 2002 at 06:43:37PM +0200, J.Pietschmann wrote:
Aaron Optimizer Digulla wrote:
What I basically need is:
<xsl:variable name="infodoc" select="document('infodoc.xml')"/>
<xsl:variable name="info" select="$infodoc/id($key)"/>
ie. I have an XML document in $infodoc which has IDs and I want to
lookup elements in $infodoc.
The id() and key() functions work on the document which the
current context node is from. A standard technique to change
the document is to use xsl:for-each:
<xsl:variable name="infodoc" select="document('infodoc.xml')"/>
<xsl:for-each select="$infodoc">
<xsl:variable name="info" select="id($key)"/>
... do something with $info ...
</xsl:for-each>
I tried to use key() and it actually works but I can't use the
result:
<xsl:variable name="info-fragment">
<xsl:for-each select="$imginfo">
<xsl:copy-of select="key('imgInfoKey', $path-key)"/>
</xsl:for-each>
</xsl:variable>
...
so apparently there is something in $info-fragment but what?
If you use xsl:variable without select, it will be an RTF (result
tree fragment). A RTF has always exactly one root node, same like
every XML document has. This is what causes the count()=1. OTOH,
the root node never has any attribute, therefore
exslt:node-set($info-fragment)/@width
is empty. You should try exslt:node-set($info-fragment)/*/@width
or something replacing the * with the element name of one of the
elements copied into the RTF.
Ahhh.... yes, when I do "exslt:node-set ($info-fragment)/*", then
it suddenly work!
And thanks to your explanation I suddenly understand what is
going on, too!
Thanks a lot!
I suspect that "key didn't work", i.e. didn't select anything,
because it tried to look up the key in the original document
rather than the $infodoc document.
Err no, I had defined it the wrong way (mixed name and match,
used the wrong element in match and two more mistakes). After
finally understanding how it is supposed to work, I could fix
the mistakes and make it work :-)
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Aaron "Optimizer" Digulla, digulla(_at_)sowatec(_dot_)com
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