A uniquely identifiable set of valid concept representations, where any concept representation can be tested to determine whether or not it is a member of the value set.
The role of a value set is to constrain the permissible content for a particular use (e.g. data entry into a particular field).
- Release File Specification section Reference Set Types.
- Full HL7 definition of Value set in Core Principles and Properties of HL7 Version 3 Models.