2151 - Period type code - UN/CEFACT Revision 2001B Code List

2151 -	Period type code UN/CEFACT Revision 2001B Code List
Repr:	an..3
Desc:	Code specifying the type of period.
	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
	A subdivision of a year into four equal parts.
6M	Half-year
	A subdivision of a year into two equal parts.
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
	The twenty-four hour period during which the earth completes one rotation on its axis.
DC	Ten days period
	Period of 10 days.
DW	Work day
	Self explanatory.
F	Period of two weeks
	Self-explanatory.
H	Hour
	One of the twenty-four sub-divisions of a day.
HM	Half month
	A subdivision of a month into two equal parts.
M	Month
	One of twelve divisions of the year as determined by the Gregorian calendar.
MN	Minute
	A unit of time equal to 1/60 of an hour, or 60 seconds.
P	Four month period
	A period of time, measured in monthly increments, consisting of four sequential months.
S	Second
	A unit of time equal to 1/60 of a minute.
SD	Surface day
	The voyage duration irrespective of time zones.
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
	The period of time as measured by the Gregorian calendar in which the earth completes a single revolution around the sun.
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 -