MT 670 Field Specifications

5. Field 20C: Reference

FORMAT

Option C

:4!c//16x

(Qualifier)(Reference)

PRESENCE

Mandatory in optional subsequence A1

QUALIFIER

(Error code(s): T89)

Order	M/O	Qualifier	R/N	CR	Options	Qualifier Description
1	M	RELA	N		C	Related Message Reference
	or	PREV	N		C	Previous Message Reference

DEFINITION

This qualified generic field specifies:

PREV	Previous Message Reference	Message reference of a previously sent SSI update notification message.
RELA	Related Message Reference	Message reference of a related message which was previously received.

NETWORK VALIDATED RULES

Reference must not start or end with a slash '/' and must not contain two consecutive slashes '//' (Error code(s): T26).

USAGE RULES

When field :20C::PREV Previous Reference is used, for example, because the message is linked to a previously sent SSI Update Notification, field :20C::PREV Previous Reference may contain the content of field :20::SEME Sender's Message Reference of the previous MT 670. If the original message was not an MT 670 but some other communication, field :20C::PREV Previous Reference may contain the reference of this communication.

When :20C::RELA Related Reference is used, for example, because the SSI Update Notification is sent in response to a request for the SSI Update Notification, field :20C::RELA Related Reference may contain the reference of the request.