This is the Journal Type relevant to the Document. For POS this is the link from the Invoice Nos page in POS/Miscellaneous, and will be held against either the tty no.of the printer or the sequence number, referenced in the Documents page held in POS parameters file. (These were being attached to every document before.). For POS usage, the Journal Type MUST not be left blank, otherwise it will use a spurious range of numbers held in NL for the same Journal class but with a blank Journal type.