A set of ordered characters intended to convey information (ISO 2382-4). A series of segments structured in a specific order in a message dictionary, beginning with a message header and ending with a message trailer (ISO 9735). Messages undergo a technical evaluation. This is a process by which UN /EDIFACT message draughts and their corresponding directories are checked for compliance with rules for syntax, message design, and syntax application. Technical evaluation is a task performed within the message teams as part of the UN /EDIFACT agreed-upon procedures. The term « message » refers to the way in which data is structured to perform a particular function so that it can be transmitted and processed electronically under standardised conditions.