for Payment System
Research and Cooperation
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There are always misunderstandings with regard to the creation, processing and transfer of EDIFACT communications with regard to the display characters which are or will be used here.
In principle, and how else, ISO display characters are used for EDIFACT, which is also based on an ISO standard. Which one that is, is determined at the beginning of an interchange in the UNB segment and is valid only for this. The display character specified in ISO 646 must be used exclusively up to at least the second box of this segment including a possible prior UNA segment. Thereafter the display character specified in the UNB can be used. In Europe it has been agreed that the choice of the display character shall be limited to namely: UNOA, UNOB and UNOC. The requirements of the east European countries and the lack of the EURO display character led to the application for the UNOQ code, which is also being included in the repertoire of display characters. The first two, UNOA and UNOB, are described in ISO 9537, which determined the main structure of EDIFACT; UNOC is described in ISO 8859-1, also known under the name of ANSI code, and UNOQ in ISO 8859-15.
With regard to establishment and processing systems are used in part to which the ISO code is unknown or where only partial amounts of the display characters can be processed and transported. In addition it occurs that certain display characters are specific to certain countries and cannot be designed to be expressed or which even lead to irritations in the equipment. In order to counteract this Austrian banks have agreed to exchange parts of the display characters delivered if necessary in processing and expression against those, which can be used in all probability by all equipment. This is especially true for foreign payments transfer. In this respect it is also ensured that the meaning and the content is changed as little as possible. This results in the complete set of available display characters being sent to the bank, but where the bank itself, however, is not necessarily able to deliver all the available display characters.
On the part of the customer a coded interchange in accordance with UNOA, UNOB or UNOC must be sent to the bank. For certain large customers, whose systems work with EBCDIC the delivery in EBCDIC will be permitted subject to bilateral agreements, whilst between the banks mainly EBCDIC is used.
The ISO 8859-1 (ANSI,UNOC) is the normal display character type on the most widely used PC operating systems today. These should entail the least number of problems. A complete series of users and applications, however, use the "IBM PC Extended ASCII Display Character Set 437" or the "IBM PC Extended ASCII Display Character Set 850". These are wrongly often known as ASCII display character sets. The ASCII display character set (American Standard Code for Information Interchange) has been taken over by ISO into ISO 646 and contains a 7 digit display character set. In this respect production requires recoding.
A further problem is represented by the further transfer with regard to payments abroad (and also for payments received), since in his connection mainly the S.W.I.F.T network (or a similar transport channel) is used as a means of transport, which can only transport an inventory of display characters which corresponds only partially to the UNOB display character set. Moreover, the volume of information is very limited versus EDIFACT, but this is another subject.
On the following pages the already mentioned display character sets are listed as well as some necessary recoding allocations. Furthermore we make some remarks in the subject if the display characters within EDIFACT interchanges.
With regard to display characters please consult the generally well structured page: http://www.jimprice.com/jim-asc.htm.