CDS Interchanges submitted or received must use the correct CDS Header and Trailer Controls to provide Interchange and Message addressing and identification.
Every CDS Interchange must consist of:
Multiple CDS messages are usually sent in a single CDS Interchange.
The CDS Interchange Trailer signifies the end of a CDS Interchange and contains control information for the Interchange.
|M||CDS INTERCHANGE CONTROL REFERENCE|
|M||CDS INTERCHANGE CONTROL COUNT|
|O||CDS INTERCHANGE SENDER IDENTITY|
|O||CDS INTERCHANGE RECEIVER IDENTITY|