Reference Set Base

Field	Data type	Purpose		Part of Primary Key
id		A 128 bit unsigned , uniquely identifying this . Different versions of a reference set member share the same but have different . This allows a reference set member to be modified or made (i.e. removed from the active set) at a specified time.	NO	YES (Full /Snapshot)
		The inclusive date or time at which this version of the identified became the current version. Note: In distribution files the effectiveTime should follow the short ISO date format (YYYYMMDD) and should not include the hours, minutes, seconds or timezone indicator. The current version of this at time T is the version with the most recent prior to or equal to time T .	YES	YES (Full) Optional (Snapshot)
		The state of the identified as at the specified . If = 1 (true) the is part of the current version of the set, if = 0 (false) the is not part of the current version of the set.	YES	NO
		Identifies the that contains this as at the specified . The value must be a of within the metadata .	YES	NO
		Identifies the to which this belongs.	NO	NO
		A reference to the to be included in the .	NO	NO