Sometimes you need to generate unique identifiers for generated XML elements. This article describes how to obtain random ids when executing transformation in Java.

Random number generator

<xsl:variable name="random" select="java:java.util.Random.new()"/>

{geshi}<xsl:template name="random_id"><xsl:value-of
select="format-number(round(9999 * java:nextDouble($random)), '0000')" /></xsl:template>
{/geshi}

<xsl:template match="NaryOperator[@id='72']"     ><math:apply><xsl:attribute 
name="id"><xsl:call-template name="random_id" /></xsl:attribute><math:times/><xsl:apply-templates 
/></math:apply></xsl:template> 

<xsl:stylesheet  
                        version="1.0" 
                        xmlns:xsl="http://www.w3.org/1999/XSL/Transform" 
                      
                       xmlns:java="http://xml.apache.org/xslt/java"
                       >