The INMR01 record is always the first record of a transmission. The identifier of the record is ‘INMR01’ in bytes 2-7. The remainder of the record (beginning with byte 8) is composed of text units. The text unit keys always present are:

INMFNODE

Origin node name

INMFTIME

Origin timestamp

INMFUID

Origin user ID

INMLRECL

Length of physical control record segments

INMTNODE

Target node name

INMTUID

Target user ID

Text units that can be present are:

INMFACK

Receipt notification requested

INMFVERS

Origin version number

INMNUMF

Number of files in this transmission

INMUSERP

User parameter string