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Call-template with parameter

File: Data.xml <?xml version="1.0"?> <SCENE>   <TITLE>title</TITLE>   <STAGEDIR>A</STAGEDIR>   <SPEECH>     <SPEAKER>C</SPEAKER>     <LINE>B</LINE>     <LINE>C</LINE>     <LINE>D</LINE>   </SPEECH> </SCENE> File: Transform.xslt <?xml version="1.0"?> <xsl:transform xmlns:xsl="http://www.w3.org/1999/XSL/Transform"   xmlns:xs="http://www.w3.org/2001/XMLSchema"   exclude-result-prefixes="xs" version="2.0">   <xsl:template name="longest-speech" as="element(SPEECH)?">     <xsl:param name="list" as="element(SPEECH)*" />     <xsl:choose>       <xsl:when test="$list">         <xsl:variable name="first" select="count($list[1]/LINE)"           as="xs:integer" />         <xsl:variable name="longest-of-rest"           as="element(SPEECH)?">           <xsl:call-template name="longest-speech">             <xsl:with-param name="list"               select="$list[position()!=1]" />           </xsl:call-template>         </xsl:variable>         <xsl:choose>           <xsl:when             test="$first gt count($longest-of-rest/LINE)">             <xsl:sequence select="$list[1]" />           </xsl:when>           <xsl:otherwise>             <xsl:sequence select="$longest-of-rest" />           </xsl:otherwise>         </xsl:choose>       </xsl:when>     </xsl:choose>   </xsl:template>   <xsl:template match="/">     <longest-speech>       <xsl:call-template name="longest-speech">         <xsl:with-param name="list" select="//SPEECH" />       </xsl:call-template>     </longest-speech>   </xsl:template> </xsl:transform> Output: <?xml version="1.0" encoding="UTF-8"?><longest-speech><SPEECH>     <SPEAKER>C</SPEAKER>     <LINE>B</LINE>     <LINE>C</LINE>     <LINE>D</LINE>   </SPEECH></longest-speech>