Hi, Peter.
news <[EMAIL PROTECTED]> wrote on 2008-04-17 09:48:00 AM:
> I'm trying to convert a result tree fragment into a nodeset using
> xsl:copy-of. From the w3c spec, if I understand it correct, this should
be
> possible:
>
> "When a result tree fragment is copied into the result tree (see [11.3
Using
> Values of Variables and Parameters with xsl:copy-of]), then all the
nodes
> that are children of the root node in the equivalent node-set are added
in
> sequence to the result tree."
>
> I'm using the following piece of code: <xsl:variable
> name="node"><node><xsl:copy-of
select="$fragment"/></node></xsl:variable>
>
> The following error occurs in this line: "#RTREEFRAG kann nicht in
NodeList
> konvertiert werden!"
As Joe was pointing out, there are restrictions on the operations that may
be performed on a result tree fragment (nodes constructed by the
stylesheet, rather than read from the input document). Section 11.1 of
XSLT 1.0 [1] has this to say, "An operation is permitted on a result tree
fragment only if that operation would be permitted on a string (the
operation on the string may involve first converting the string to a
number or boolean). In particular, it is not permitted to use the /, //,
and [] operators on result tree fragments." However, it goes on to say,
"When a result tree fragment is copied into the result tree (see [11.3
Using Values of Variables and Parameters with xsl:copy-of]), then all the
nodes that are children of the root node in the equivalent node-set are
added in sequence to the result tree," so the xsl:copy-of operation should
not be a problem (unless there's a bug in the processor, but I've not been
able to reproduce that.
So, the first question must be, are you attempting to use / or // or []
operators on a result tree fragment?
and later...
news <[EMAIL PROTECTED]> wrote on 2008-04-17 05:02:33 PM:
> Hm, might it have to do with building the fragment using a key on an
> external document?
>
> I've been using sth like this:
> <xsl:variable name="external" select="document('ext.xml')"/>
> <xsl:variable name="fragment">
> <xsl:for-each select="$fragment">
> <xsl:copy-of select="key(...)"/>
> </xsl:for-each>
> </xsl:variable>
Probably not. Doing an xsl:copy-of on a result tree fragment is always
permitted - it doesn't matter how it was constructed.
As I said, the usual reason for this error is that you are attempting to
apply a path expression (/, // or [] operators) to a result tree fragment.
If that's not the case, please produce a complete, stand-alone stylesheet
with input that demonstrates the problem - otherwise, we're all just
making guesses at what might be going wrong.
Thanks,
Henry
[1] http://www.w3.org/TR/xslt#section-Result-Tree-Fragments
------------------------------------------------------------------
Henry Zongaro
XML Transformation & Query Development
IBM Toronto Lab T/L 313-6044; Phone +1 905 413-6044
mailto:[EMAIL PROTECTED]
