Thank you.

It works perfectly.

I attach the dyn:evaluate example XSL for someone who has the same
problem as mine. With xalan, no need to do anything to use dyn:evaluate.
Just use.

----------------------------------------------------------------------
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
version="1.0"
    xmlns:dyn="http://exslt.org/dynamic"
    extension-element-prefixes="dyn"
>
    <xsl:output method="xml"/>

    <xsl:template match="/">
        <ROOT>
            <xsl:apply-templates />
        </ROOT>
    </xsl:template>

    <xsl:template match="xpath">
        <RESULT>
            <XPATH><xsl:value-of select="."/></XPATH>
            <xsl:variable name="xpathstr"
select="concat('document(&quot;data.xml&quot;)',.)"/>
            <VALUE><xsl:value-of select="dyn:evaluate($xpathstr)"/></VALUE>
        </RESULT>
    </xsl:template>

</xsl:stylesheet>


Son KwonNam wrote:
> In XSLT, is this possible to get value from xml using XPath
> which is in XSLT variable?
> 
> I mean XPath strings can be dynamic while XSL Transforming.
> 
> If possible, How??
> 
> Because I'm not a native English speaker, it's quite hard
> to make the problem clear. Please see the following example.
> 
> There are two XML files.
> One has data, and the other has xpath. I will transform
> the XPath XML.
> 
> for example,
> 
> * XPath XML
> <xpaths>
>         <xpath>/students/student/name</xpath>
>         <xpath>/students/student/id</xpath>
> </xpaths>
> 
> * Data XML : data.xml
> <students>
>         <student>
>                 <name>John Doe</name>
>                 <id>234234</id>
>         </student>
> </students>
> 
> * XSL snippet.
> <xsl:template match="//xpath">
> 	<xsl:variable name="xpathstring" select="."/>
>         <B>XPaht : <xsl:value-of select="$xpathstring"/></B>
> 	<B>Value : <xsl:value-of select="document('data.xml')/$xpathstring" />
> </B> </xsl:template>
> 
> 
> As you know, that <xsl:value-of select(document(bla...)/> line
> does not
> work.
> 
> Any solution for this problem in XSLT?
> I use JDOM/Xalan for transforming.
> 
> Thanks,