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Variable scope

File: Data.xml <?xml version="1.0" encoding="utf-8"?> <!-- testlines.xml --> <ul>   <li>A</li>   <li>B</li>   <li>C</li> </ul> File: Transform.xslt <?xml version="1.0"?> <xsl:stylesheet version="1.0"   xmlns:xsl="http://www.w3.org/1999/XSL/Transform">   <xsl:output method="text"/>   <xsl:template match="/">     <xsl:apply-templates select="ul/li"/>   </xsl:template>   <xsl:template match="li">     <xsl:variable name="single-quote">       <xsl:text>&apos;</xsl:text>     </xsl:variable>     <xsl:variable name="two-quotes">       <xsl:text>&apos;&apos;</xsl:text>     </xsl:variable>     <xsl:variable name="sub1">       <xsl:call-template name="replace-substring">         <xsl:with-param name="original" select="."/>         <xsl:with-param name="substring" select="'&amp;'"/>         <xsl:with-param name="replacement" select="'^&amp;'"/>       </xsl:call-template>     </xsl:variable>     <xsl:variable name="sub2">       <xsl:call-template name="replace-substring">         <xsl:with-param name="original" select="$sub1"/>         <xsl:with-param name="substring" select="'|'"/>         <xsl:with-param name="replacement" select="'^|'"/>       </xsl:call-template>     </xsl:variable>     <xsl:call-template name="replace-substring">       <xsl:with-param name="original" select="$sub2"/>       <xsl:with-param name="substring" select="$single-quote"/>       <xsl:with-param name="replacement" select="$two-quotes"/>     </xsl:call-template>     <xsl:text>&#xA;</xsl:text>   </xsl:template>   <xsl:template name="replace-substring">     <xsl:param name="original" />     <xsl:param name="substring" />     <xsl:param name="replacement" />     <xsl:choose>       <xsl:when test="contains($original, $substring)">         <xsl:value-of            select="substring-before($original, $substring)" />         <xsl:value-of select="$replacement" />         <xsl:call-template name="replace-substring">           <xsl:with-param name="original"              select="substring-after($original, $substring)" />           <xsl:with-param              name="substring" select="$substring" />           <xsl:with-param              name="replacement" select="$replacement" />         </xsl:call-template>       </xsl:when>       <xsl:otherwise>         <xsl:value-of select="$original" />       </xsl:otherwise>     </xsl:choose>   </xsl:template>              </xsl:stylesheet> Output: A B C