Figure 2-1: Standards Govern the Exchange of Messages continued General Message Syntax Organization General Message Organization(Figure 2-4) Primary parts of messages Data Field (content to be delivered) Header(everything before the data field) Trailer(everything after the data field The header and trailer act like a delivery envelope for the data field Trailer Data Field Header 2-92-9 Figure 2-1: Standards Govern the Exchange of Messages, Continued • General Message Syntax (Organization) – General Message Organization (Figure 2-4) – Primary parts of messages • Data Field (content to be delivered) • Header (everything before the data field) • Trailer (everything after the data field) – The header and trailer act like a delivery envelope for the data field. Trailer Data Field Header