Added the XML code developped at W3C, Daniel.
diff --git a/result/dav4 b/result/dav4
new file mode 100644
index 0000000..3c38b64
--- /dev/null
+++ b/result/dav4
@@ -0,0 +1,21 @@
+
+
+------- test/dav4 -----------
+<?xml version="1.0"?>
+<?xml:namespace ns="http://www.w3.com/standards/z39.50/" prefix="Z"?>
+<?xml:namespace ns="http://www.ietf.org/standards/dav/" prefix="D"?>
+<D:propertyupdate>
+ <D:set>
+ <D:prop>
+ <Z:authors>
+ <Z:Author>Jim Whitehead</Z:Author>
+ <Z:Author>Roy Fielding</Z:Author>
+ </Z:authors>
+ </D:prop>
+ </D:set>
+ <D:remove>
+ <D:prop>
+ <Z:Copyright-Owner/>
+ </D:prop>
+ </D:remove>
+</D:propertyupdate>