Hi,
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
> On Behalf Of Tom Stanley
>
> hello, guys
> we plan to use libxml and libxslt in our projects.
> what we need are like snippet belows:
> <ActivityInput>
> <body>
> <pfx:field>
> <pfx:name>
> <xsl:value-of
> select=""Data""/>
> </pfx:name>
> <pfx:id>
> <xsl:value-of select="0"/>
> </pfx:id>
> <pfx:simple>
> <xsl:value-of
> select="string($var/Report/Data[1])"/>
> </pfx:simple>
> </pfx:field>
> </body>
> </ActivityInput>
> We want to use something like xslt template to
> produce some xml tree as process's input.
> We can change this xml snippet to a xslt template and
> use applystylesheet to produce expected output xml
> tree.
> However, we need to set a variable (named var ) in
> program before apply the translation.
> Does libxslt have any method to do this ,for example
> like xmlXPathRegisterVariable in libxml?
>
> or any other thoughts?
The common solution for this would be to use the document() function:
<xsl:template match="/">
<foo>
<xsl:value-of select="document('my-report.xml')/Report/Data[1]"/>
</foo>
</xsl:template>
If you need a more sophisticated mechanism, then you could implement
an extension element/function. Have a look at how e.g. the
EXSLT function node-set() is implemented in Libxslt/Libexslt:
The XPath engine calls exsltNodeSetFunction() (in "libexslt/common.c"),
then xsltFunctionNodeSet() (in "libxslt/extra.c") is called, which
changes a result tree fragment into a node set.
In such an extension function, you could just hand-over a copy of an
internal node tree managed by your application.
<foo>
<xsl:value-of select="mf:my-func('my-var-name')/Report/Data[1]"/>
</foo>
Regards,
Kasimier
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