A service segment starting and uniquely identifying a message. The message type code for the Request for document message is REQDOC. Note: Request for document messages conforming to this document must contain the following data in segment UNH, composite S009: Data element 0065 REQDOC D B UN
A segment with free text information, in coded or clear form, used when additional information is needed but cannot be accommodated within other segments. In computer to computer exchanges such text will normally require the receiver to process this segment manually.
A segment identifying names and addresses of the parties, in coded or clear form, and their functions relevant to the request for document message. Identification of the sender of the request and the recipient is mandatory for the request for document message. It is recommended that where possible only the coded form of the party ID should be specified e.g. the sender and receiver of the report are known to each other, thus only the coded ID is required, but when a new address might have to be clearly specified, e.g. where the document is to be sent to a third party, this should be done preferably in structured format.