Reference sets types are identified by concepts that are subtypes of the metadata concept
900000000000455006 |reference set|. Individual reference sets of a particular type are identified and named by concepts that are subtype descendants of the concept that identifies the reference set type.
Table 5.1.4-1: Reference Set Types in the Metadata Hierarchy (2018-01-31)
Other concepts within the metadata hierarchy are used to name additional attributes within particular types of reference sets and to provide values for those attributes.
Table 5.1.4-2: Reference Set Attributes in Metadata Hierarchy (2018-01-31) (some omitted)