2151 - Type of period, coded - UN/CEFACT Revision 1999A Code List

2151 -	Type of period, coded UN/CEFACT Revision 1999A Code List
Repr:	an..3
Desc:	Agreed or specified period of time (coded).
	This table also occurs in the following versions of this standard: D00A, D00B, D01A, D01B, D01C, D02A, D02B, D03A, D03B, D04A, D04B, D93A, D94A, D94B, D95A, D95B, D96A, D96B, D97A, D97B, D98A, D98B, D99A, D99B

3M	Quarter
	Self explanatory.
6M	Half-year
	Self explanatory.
AA	Air hour
	Flight duration irrespective of time zones.
AD	Air day
	Flight duration irrespective of time zones.
CD	Calendar day (includes weekends and holidays)
	Period given as a number of days including weekends and holidays.
CW	Calendar week (7day)
	Period given as a number of 7day-weeks including holidays.
D	Day
	Self explanatory.
DC	Ten days period
	Period of 10 days.
DW	Work day
	Self explanatory.
F	Period of two weeks
	Self-explanatory.
H	Hour
	Self explanatory.
HM	Half month
	Self explanatory.
M	Month
	Self explanatory.
MN	Minute
	Self explanatory.
P	Four month period
	Self explanatory.
S	Second
	Self explanatory.
SD	Surface day
	Description to be provided.
SI	Indefinite
	An indefinite period.
W	Week
	Period of seven days.
WD	Working days
	Days when the partner company normally works.
WW	5 day work week
	Monday through Friday.
Y	Year
	Self explanatory.
ZZZ	Mutually defined
	Period as per agreement.

Change indicators
plus sign		An addition.
asterisk		Addition/substraction/change to a code entry for a particular data element.
hash or pound sign		Changes to names.
vertical bar		Changes to text for descriptions, notes and functions.
minus sign		A deletion.
letter X		Marked for deletion.

Usage indicators
	Used in batch messages only.
	Common usage in both batch and interactive messages.
	Used in interactive messages only.

2151 -