OID value: 1.2.840.1135188.8.131.521
This rule is limited to filters that apply to the DN. This is a special "extended match operator that walks the chain of ancestry in objects all the way to the root until it finds a match. Found a new extension not yet in your DB! Awesome webpage!
URL for further info: http://msdn.microsoft.com/en-us/library/windows/desktop/aa746475(v=vs.85).aspx
See also the OID Repository website reference for 1.2.840.1135184.108.40.2061