MT 558 Field Specifications

18. Field 20C: Reference

FORMAT

Option C

:4!c//16x

(Qualifier) (Reference)

PRESENCE

Mandatory in an optional sequence

QUALIFIER

(Error code(s): T89)

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

DEFINITION

This qualified generic field specifies:

RELA	Related Reference	Reference assigned by the client to the message to which this message is the reply.
PREV	Previous Reference	Reference of the linked message which was previously sent.

NETWORK VALIDATED RULES

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