nginx/docs/xsls/dump.xsls

X:stylesheet {

X:output method="xml"
X:param indent-increment="'   '";

X:template noname(indent="'
'") = "*" {
        !{$indent}

        X:if "name()='xsl:template'" {
                !{$indent}
        }

        X:copy {
           X:copy-of "@*"
           !!( indent = "concat($indent, $indent-increment)" );
           X:if "./* " { !{$indent}  }
        }
}

 
X:template = "comment()|processing-instruction()" {
    X:copy;
}

<!--
X:template ="text()[normalize-space(.)='']" {}
-->

}