5.159 rdnType
rdnType is an abstract attribute present on every object. The rdnType of an object is the RDN attribute of the object, that is, an ATTRTYP that identifies the attributeSchema object of the RDN attribute. rdnType is not represented in the schema and does not replicate in the normal way.
On an originating Add, the new object's rdnType is derived from the most specific structural object class of the new object.
On a replicated Add, rdnType is derived as follows:
If the forest functional level is less than DS_BEHAVIOR_WIN2003, rdnType is derived from the objectClass of the object, which replicates.
If the forest functional level is DS_BEHAVIOR_WIN2003 or greater, rdnType is derived from the DN of the object, which replicates.