<?xml version="1.0"?>
<?xml-stylesheet type="text/xml" href="test.xsl"?>
<PERIODIC_TABLE>
  <ATOM STATE="GAS">
    <NAME num="1">Hydrogen</NAME>
    <SYMBOL>H</SYMBOL>
    <ATOMIC_NUMBER> 1 </ATOMIC_NUMBER>
    <ATOMIC_WEIGHT> 1 . 00794 </ATOMIC_WEIGHT>
    <BOILING_POINT UNITS="Kelvin"> 20 . 28 </BOILING_POINT>
    <MELTING_POINT UNITS="Kelvin"> 13 . 81 </MELTING_POINT>
    <DENSITY UNITS="grams/cubic centimeter">
      <!-- At 300K, 1 atm -->
       0 . 0000899 
    </DENSITY>
  </ATOM>
  <ATOM STATE="GAS">
    <NAME num="2">Helium</NAME>
    <SYMBOL>He</SYMBOL>
    <ATOMIC_NUMBER> 2 </ATOMIC_NUMBER>
    <ATOMIC_WEIGHT> 4 . 0026 </ATOMIC_WEIGHT>
    <BOILING_POINT UNITS="Kelvin"> 4 . 216 </BOILING_POINT>
    <MELTING_POINT UNITS="Kelvin"> 0 . 95 </MELTING_POINT>
    <DENSITY UNITS="grams/cubic centimeter"><!-- At 300K -->
       0 . 0001785 
    </DENSITY>
  </ATOM>
</PERIODIC_TABLE>

<?xml version="1.0"?>
<xsl:stylesheet version="1.0" 
          xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
	<xsl:template match="/PERIODIC_TABLE">
		<xsl:for-each select="//NAME">
		<xsl:choose>
			<xsl:when test="@num='1'">
			<!--<xsl:if test="@num='1'">-->
				<xsl:value-of select="//NAME"/>
			<!--</xsl:if>-->
			</xsl:when>
			<xsl:otherwise>
				<xsl:value-of select="//SYMBOL"/>
			</xsl:otherwise>
		</xsl:choose>
		</xsl:for-each>
	</xsl:template>
</xsl:stylesheet>