INTERNATIONAL  TELECOMMUNICATION  UNION

		     ITU-T RECOMMENDATION SUMMARY


Rec. No. : X.435

Title :	Message handling systems: EDI messaging system

Study Group : VII - Data Communications Networks

Version : New

Date of adoption : 1991

Notes :	


Recommendation X.435 is one of a set of Recommendations for message 
handling (MOTIS). The entire set provides a comprehensive blueprint 
for a message handling system (MHS) realized by any number of 
cooperating open systems.

The purpose of an MHS is to enable users to exchange messages on a 
store-and-forward basis. A message submitted on behalf of one user, 
the originator, is conveyed by the message transfer system (MTS) and 
subsequently delivered to the agents of one or more additional users, 
the recipients. Access units (AU) link the MTS to communication 
systems of other kinds (e.g., postal systems). A user is assisted in 
the preparation, storage, and display of messages by a user agent 
(UA). Optionally, it is assisted in the storage of messages by a 
message store (MS). The MTS comprises a number of message transfer 
agents (MTA) which collectively perform the store-and-forward message 
transfer function.

Recommedation X.435 defines the message handling application called 
EDI messaging (EDIMG), a form of message handling tailored for 
exchange of electronic data interchange (EDI) information, a new 
message content type and associated procedures known as Pedi. It is 
designed to meet the requirements of users of ISO 9735 (EDIFACT), and 
other commonly used EDI systems.

Recommendation X.435 is one of a series on message handling. 
Recommendation X.402 conctitutes the introduction to the series and 
identifies the other documents in it.

The architectural basis and foundation for message handling are 
defined in still other Recommendations. Recommendation X.402 
identifies those documents as well.



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