package net.witr.xslt;

public class XslDebug {

    public static void debug(String msg){
        System.out.println(msg);
    }

}

<xsl:stylesheet xmlns:witrdebug="net.witr.xslt.XslDebug">
  ..
  <xsl:template match="DIV">
    <xsl:variable name="debugName" select="name(.)"></xsl:variable>
    <xsl:variable name="debugStyle" select="@style"></xsl:variable>
    <xsl:value-of select="witrDebug:debug(concat('Matched ',$debugName,'; style :',$debugStyle))"></xsl:value-of>
  </xsl:template>
  ..
</xsl:stylesheet>