On Jul 19, 2006, at 3:36 PM, Bill Chessman wrote:
> 3. If it is EDIFACT, then yes, it is possible for DTM+2 to exist.
Sadly enough Bill is correct, even if it makes no sense to only send
the qualifier :-(
> (Although it might not mean anything, the segment definition up
> through
> version D.05B does not require any of the other sub-elements to
> appear.)
There is an exception the D90.2 directory, also known as the QC
output. This directory was the one that defined for EDIFACT the
concept of a format qualifier for the value filed first used in the
new DTM segment.
Here is a short history recap regarding the changes that EDIFACT DTM
segment has undergone since it was first created in the 88.1 directory.
DTM was defined before D90.2 in D88.1 and D90.1 as:
DTM DATE/TIME REFERENCE 88.1
Function: To specify pertinent dates and times
2005 DATE/TIME QUALIFIER M an..3 id 1 3
2001 DATE, CODED C n6 n 6 6
2002 TIME C n4 n 4 4
2461 TIME ZONE SPECIFIER, CODED C an3 an 3 3
The D90.2 directory defined the DTM with all date element as
mandatory since the designers were positive that without all 3
elements having values one could not evaluate the content correctly
(BTW this version was used in the design of the X12 DTM segment):
* DTM DATE/TIME/PERIOD (88.1) 90.2
Function: To specify date, time, period.
C507 DATE/TIME/PERIOD M
2005 Date/time/period qualifier M an..3
2782 Date/time/period M an..35
2781 Date/time/period format qualifier M an..3
However that change was short lived as a number of users complained
that their business case would not require the need for a value in
the date/time/period d/e and/or the format qualifier. No examples
were ever provided to support such claims nor has anyone ever seen
such a case in real life. The end result, due to the political
pressure existing at that time, was that the D91.1 directory
contained the new DTM which allowed only the qualifier to be send:
DTM DATE/TIME/PERIOD (91.1)
Function: To specify date, time, period.
* C507 DATE/TIME/PERIOD M
2005 Date/time/period qualifier M an..3
2380 Date/time/period C an..35
2379 Date/time/period format qualifier C an..3
Today the DTM segment has undergone a few naming adjustment but other
then that still is the same regarding is conditional use of the last
two data elements.
DTM DATE/TIME/PERIOD
Function: To specify date, and/or time, or period.
010 C507 DATE/TIME/PERIOD M 1
2005 Date or time or period function code
qualifier M an..3
2380 Date or time or period text C an..35
2379 Date or time or period format code C an..3
A sidebar note, after the creation of the 9735 Version 4, the
suggestion was made to correct this someone ambiguous definition with
adding dependency notes to the C507 composite that would at least
define the need for a value within d/e 2380 if a format qualifier was
present in d/e 2379. The suggestion was ignored as the users wanted
backward compatibility more then functionally correct defined
segments/composites.
-Klaus
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