Messages
A message is a unit of data transferred between connection points. Each
message has a message type that defines its purpose. For example, the ADT
message type is used to transmit portions of a
patient's ADT
data. It is transmitted from one
connection point, the data source, to another, the data sink.
A message consists of a group of segments in a defined sequence. A three-character segment code contained within each message identifies the segment's type.
New segments can be optionally added at the top or at the end of the message.