A reference set member as created or modified at a particular point in time.
Notes
A reference set member version is represented in release files as a single row with an identifier, unique to that reference set member.
The identifier is shared by other versions of that reference set member as indicated by the effectiveTime and active fields.
The effectiveTime field indicates the point in time at which this version of the reference set member was created or superseded the previous version of the same reference set member.
The active field indicates if the reference set member is active or inactive.
