xml - How to generate alphabetical list in xslt -

how create alphatical list link in xslt such as;

<a href="sample.htm?letter=a">a</a> <a href="sample.htm?letter=b">b</a> <a href="sample.htm?letter=c">c</a> ...up to.. <a href="sample.htm?letter=z">z</a> 

it can xml transform

<node>     <letter>abcdefghijklmnopqrstuvwxyz</text> </node> 

or varible?

<xsl:variable name="letter">abcdefghijklmnopqrstuvwxyz</xsl:variable> 

xslt 1.0

<?xml version="1.0" encoding="utf-8"?> <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/xsl/transform" version="1.0">      <xsl:output method="html"/>      <xsl:variable name="url">sample.htm</xsl:variable>     <xsl:variable name="letter">abcdefghijklmnopqrstuvwxyz</xsl:variable>      <xsl:template match="/">         <xsl:call-template name="iterate">             <xsl:with-param name="string" select="$letter"/>         </xsl:call-template>     </xsl:template>      <xsl:template name="iterate">         <xsl:param name="string"/>         <xsl:param name="length" select="1" />          <xsl:if test="string-length($string)">              <xsl:variable name="char" select="substring($string, 1, 1)" />              <xsl:call-template name="createentry">                 <xsl:with-param name="token" select="$char"/>             </xsl:call-template>              <xsl:call-template name="iterate">                 <xsl:with-param name="string" select="substring-after($string, $char)" />             </xsl:call-template>         </xsl:if>             </xsl:template>      <xsl:template name="createentry">         <xsl:param name="token"/>         <a href="{$url}?letter={$token}"><xsl:value-of select="$token"/></a><br/>     </xsl:template>  </xsl:stylesheet> 

explanation

store alphabet variable suggested.

pass whole string function iterate param string. [optional parameter: length]

pass single char function createentry.

function createentry output.

if like, give up