HTML link dynamically for specified file

hi @ all,


i have a problem to set a HTML - link in my xsl file dynamically to a
special file.
i want to get a link to the file, which name i get by <xsl:value-of
select="col/@physname"/>.
i get for example: "123.tif"
this name should be linked to. i tried to initialize a variable by this name
but, i think because the link tag is not xsl, the link does not take the
value of $tif nut it links to "$tif". does anybody knew a solution for
this??



<xsl:choose>
	<xsl:when test="col/@format='TIFF'">
		<xsl:variable name="tif" select="col/@physname"/>
			<a href="$tif">  <!-- here the error takes place -->
				<xsl:value-of select="col/@physname"/>
			</a>&#xA0;
	</xsl:when>
	<xsl:otherwise>
		<xsl:value-of select="col/@physname"/>&#xA0;
	</xsl:otherwise>
</xsl:choose>



thanks for help!!


jan


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