http://www.iana.org/assignments/relation/

History

Time	Change
2009-08-02 23:31:42+00:00	Created
2009-08-02 23:31:42+00:00	Associated with 1317
2009-08-02 23:37:39+00:00	Associated with 504
2009-08-02 23:41:14+00:00	Disassociated from 504