For datum 6300 changed name from TM75 to Geodetic Datum of 1965 and added aliases and remarks. Added remarks to datum 6299 and CRSs 4299 and 4300. Deprecated tfm 1229 and 1640. Changed remarks for tfm 1641. Added tfm 1953-56. Deprecated tfm 5401 and replaced it with 5406. Added UoM 9095, Coord Sys 6496, datum 5152, CRS 5754, tfms 5407-08. Added additional info source for Ireland to UoM 9095.