ADT_A20 - Bed status update

Segment structure for the ADT_A20 message in HL7 v2.5.1. Cardinality is shown as [min..max]; groups are in bold.

• MSH Message header [1..1]
• SFT Software segment [0..*]
• EVN Event type [1..1]
• NPU Bed status update [1..1]