value of the value of a variable

Here is a snippet of my call and template:

-----------------------------------------------------------------

<xsl:call-template name="get_inactive">
	<xsl:with-param name="distno" select="district_no"/>
	<xsl:with-param name="disttype" select="district_type"/>
	<xsl:with-param name="mytag" select="'full_name'"/>
	<xsl:with-param name="legislators"
select="msxsl:node-set($sorted_legislators)"/>
</xsl:call-template>

<xsl:template name="get_inactive">
	<xsl:param name="distno"/>
	<xsl:param name="disttype"/>
	<xsl:param name="mytag"/>
	<xsl:param name="legislators"/>

               <xsl:for-each
select="msxsl:node-set($legislators)/*[legislator_active = 0 and
district_no = $distno and district_type = $disttype]">

                             <xsl:value-of select="$mytag" /> <<<=====
this one ======

               </xsl:for-each>

</xsl:template>
--------------------------------------------------------------

In "this one" in the template, $mytag contains the literal "full_name"
- what I want is the *text value* of the full_name tag, but this isn't
doing it for me.  How do I get that?

TIA.

Hardy Merrill