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,