Resource Group Segment (RGS) — HL7v2 v2.5.1.
Marks the beginning of a resource group in scheduling messages (SIU, SQR). 3 fields per HL7 v2.5.1 specification.
@type t() :: %HL7v2.Segment.RGS{ extra_fields: term(), resource_group_id: term(), segment_action_code: term(), set_id: term() }