There are lots of examples which do not follow this rule. As for this example,Yes that's a new constraint comming with 2.1.14 and above ...(better respect to RFCs i supose) RDN attribute must be exactly the same (except respect of case) as the attributre difined in the object. in your case you must have:dn: cn=myname, ou=people, dc=sws, dc=oldham, dc=uk, dc=net cn: myname and NOT: cn: My NameDoes it have to be a cn attribute in this case? I seem to have built some DITs with some attributes only appear in dn.All elements of the RDN must appear as attributes in the object.