src/main/resources/org/apache/log4j/xml/default.xslt

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<xsl:transform xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
               xmlns:log4j="http://jakarta.apache.org/log4j/"
               xsl:version="1.0">

   <xsl:output method="xml" indent="yes" encoding="US-ASCII"/>

   <xsl:apply-templates select="/"/>

   <xsl:template match="/">
       <xsl:apply-templates/>
   </xsl:template>

    <xsl:template match="log4j:event">
        <log4j:event logger="{@logger}" time="{@time}" timestamp="{@timestamp}"
                     level="{@level}" thread="{@thread}">
            <xsl:apply-templates/>
        </log4j:event>
    </xsl:template>

    <xsl:template match="log4j:message">
        <log4j:message>
            <xsl:apply-templates/>
        </log4j:message>
    </xsl:template>

    <xsl:template match="log4j:NDC">
        <log4j:NDC>
            <xsl:apply-templates/>
        </log4j:NDC>
    </xsl:template>

    <xsl:template match="log4j:throwable">
        <log4j:throwable>
            <xsl:apply-templates/>
        </log4j:throwable>
    </xsl:template>

    <xsl:template match="log4j:locationInfo">
        <log4j:locationInfo class="{@class}" method="{@method}"
                            file="{@file}"  line="{@line}"/>
    </xsl:template>

    <xsl:template match="log4j:properties">
        <log4j:properties>
            <xsl:apply-templates/>
        </log4j:properties>
    </xsl:template>

    <xsl:template match="log4j:data">
        <log4j:data name="{@name}" value="{@value}"/>
    </xsl:template>

    <xsl:template match="*">
        <xsl:element name="{name()}" namespace="{namespace-uri()}">
            <xsl:apply-templates select="@*"/>
            <xsl:apply-templates select="*|text()"/>
        </xsl:element>
    </xsl:template>

    <xsl:template match="@*">
        <xsl:attribute name="{name()}" namespace="{namespace-uri()}">
            <xsl:value-of select="."/>
        </xsl:attribute>
    </xsl:template>
    
    <xsl:template match="text()">
        <xsl:value-of select="."/>
    </xsl:template>

</xsl:transform>