xsl sort query

Hi,
I have the following stylesheet & xml data and I need to dynamically sort the
data coming from the xml file.

There is a need to sort on 'if' basis, i.e.  a value(CFIndica) coming from the
xml file within a different group(HEADINGS) determines the sort. I.E. 

I need to sort by
when CFIndica = 1 then sort by cfnumber ascending
when CFIndica = 2 then sort by cfsurname ascending
when CFIndica = 3 then sort by cfcentre ascending.
AND to allow a default of 'NO' sort, i.e CFIndica might be = 4 or just have a
default of no sort.(perhaps just not apply CFIndica of 1 to 3?).

I had thought it would be something like this, but sadly no effect.
The xml data is like this,


 <GROUP_MEMBER_DETAILS>
         <CFNumber>18888</CFNumber>
         <CFTitle>Mr</CFTitle>
         <CFFirstName>Cormac</CFFirstName>
         <CFSurname>GGGGGG</CFSurname>
         <CFIden>XX999</CFIden>
         <CFCentre>1122</CFCentre>
         <CFProd>Plan B</CFProd>
         <CFCov>Hsteps</CFCov>
         <CFAdu>6</CFAdu>
         <Students>5</Students>
         <Children>7</Children>
         <Status>A</Status>
      </GROUP_MEMBER_DETAILS>

      <GROUP_MEMBER_DETAILS>
         <CFNumber>12345</CFNumber>
         <CFTitle>Mr</CFTitle>
         <CFFirstName>Cormac</CFFirstName>
         <CFSurname>AAAAAA</CFSurname>
         <CFIden>XX999</CFIden>
         <CFCentre>1122</CFCentre>
         <CFProd>Plan B</CFProd>
         <CFCov>Hsteps</CFCov>
         <CFAdu>6</CFAdu>
         <Students>5</Students>
         <Children>7</Children>
         <Status>A</Status>
      </GROUP_MEMBER_DETAILS>

      <GROUP_MEMBER_DETAILS>
         <CFNumber>14444</CFNumber>
         <CFTitle>Mr</CFTitle>
         <CFFirstName>Cormac</CFFirstName>
         <CFSurname>CCCCCC</CFSurname>
         <CFIden>XX999</CFIden>
         <CFCentre>1122</CFCentre>
         <CFProd>Plan B</CFProd>
         <CFCov>Hsteps</CFCov>
         <CFAdu>6</CFAdu>
         <Students>5</Students>
         <Children>7</Children>
         <Status>A</Status>
      </GROUP_MEMBER_DETAILS>

      <GROUP_MEMBER_DETAILS>
         <CFNumber>16666</CFNumber>
         <CFTitle>Mr</CFTitle>
         <CFFirstName>Cormac</CFFirstName>
         <CFSurname>EEEEEE</CFSurname>
         <CFIden>XX999</CFIden>
         <CFCentre>1122</CFCentre>
         <CFProd>Plan B</CFProd>
         <CFCov>Hsteps</CFCov>
         <CFAdu>6</CFAdu>
         <Students>5</Students>
         <Children>7</Children>
         <Status>A</Status>
      </GROUP_MEMBER_DETAILS>

      <GROUP_MEMBER_DETAILS>
         <CFNumber>15555</CFNumber>
         <CFTitle>Mr</CFTitle>
         <CFFirstName>Cormac</CFFirstName>
         <CFSurname>DDDDDD</CFSurname>
         <CFIden>XX999</CFIden>
         <CFCentre>1122</CFCentre>
         <CFProd>Plan B</CFProd>
         <CFCov>Hsteps</CFCov>
         <CFAdu>6</CFAdu>
         <Students>5</Students>
         <Children>7</Children>
         <Status>A</Status>
      </GROUP_MEMBER_DETAILS>

      <GROUP_MEMBER_DETAILS>
         <CFNumber>19999</CFNumber>
         <CFTitle>Mr</CFTitle>
         <CFFirstName>Cormac</CFFirstName>
         <CFSurname>HHHHHH</CFSurname>
         <CFIden>XX999</CFIden>
         <CFCentre>1122</CFCentre>
         <CFProd>Plan B</CFProd>
         <CFCov>Hsteps</CFCov>
         <CFAdu>6</CFAdu>
         <CFStu>5</CFStu>
         <CFChi>7</CFChi>
         <CFSta>A</CFSta>
      </GROUP_MEMBER_DETAILS>

I need to sort by
when CFIndica = 1 then sort by cfnumber ascending
when CFIndica = 2 then sort by cfsurname ascending
when CFIndica = 3 then sort by cfcentre ascending.
AND to allow a default of 'NO' sort, i.e CFIndica might be = 4 or just have a
default of no sort.(perhaps just not apply CFIndica of 1 to 3?).

I had thought the xsl would be like:

<!--
Define sorting in details
-->
<xsl:template match="CF_DETAILS">
	<xsl:variable name="CFOption">
		<xsl:value-of select="string(HEADINGS//CFIndica)"/>
	</xsl:variable>
	<xsl:if test="$CFOption=1">
		<xsl:apply-templates>
			<xsl:sort select="CFNumber" order="ascending"
data-type="number"/>
		</xsl:apply-templates>
	</xsl:if>
	<xsl:if test="$CFOption=2">
		<xsl:apply-templates>
			<xsl:sort select="CFSurname" order="ascending"
data-type="number"/>
		</xsl:apply-templates>
	</xsl:if>
	<xsl:if test="$CFOption=3">
		<xsl:apply-templates>
			<xsl:sort select="CFCentre" order="ascending"
data-type="number"/>
		</xsl:apply-templates>
	</xsl:if>
</xsl:template>

<!--
Define the elements that are required within the block CF_DETAILS
-->
<xsl:template match="CF_DETAILS">
  <CF_DETAILS>
	<xsl:call-template name="G_CF_DETAILS"/>		
	<xsl:apply-templates select="descendant::CFNumber"/>
	<xsl:apply-templates select="descendant::CFTitle"/>
	<xsl:apply-templates select="descendant::CFFirstname"/>
	<xsl:apply-templates select="descendant::CFSurname"/>
	<xsl:apply-templates select="descendant::CFIden"/>
	<xsl:apply-templates select="descendant::CFCentre"/>
	<xsl:apply-templates select="descendant::CFProd"/>
	<xsl:apply-templates select="descendant::CFCov"/>
	<xsl:apply-templates select="descendant::CFStu"/>
	<xsl:apply-templates select="descendant::CFStu"/>
	<xsl:apply-templates select="descendant::CFStu"/>
  </CF_DETAILS>	
</xsl:template>

<!--
call template CF_DETAILS
-->

<xsl:template name="G_CF_DETAILS">
	<xsl:element name="CF_DETAILS">
  		<xsl:attribute name="xfa:dataNode">dataGroup</xsl:attribute>
  		<xsl:text>begin</xsl:text>
	</xsl:element>
</xsl:template>

Please help out, as this is really bugging me!

cheers
Cormac

Cormac Fiddes,
Software Development,
Abbey St.

Ext: 4386

Direct Line: 01-7994009

E-Mail : Cormac.Fiddes@xxxxxx

http://www.vhihealthe.com
http://www.vhihealthcare.com
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