Qualifier Value

Qualifier values of 2151 in D18A

Period type code (an1..3)

Code specifying the type of period.

Code	Description
D	Day The twenty-four hour period during which the earth completes one rotation on its axis.
F	Period of two weeks A period of time lasting fourteen days. Synonym: Fortnight.
H	Hour One of the twenty-four sub-divisions of a day.
M	Month One of twelve divisions of the year as determined by the Gregorian calendar.
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.
W	Week Period of seven days.
Y	Year The period of time as measured by the Gregorian calendar in which the earth completes a single revolution around the sun.
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.
DC	Ten days period Period of 10 days.
HM	Half month A subdivision of a month into two equal parts.
MN	Minute A unit of time equal to 1/60 of an hour, or 60 seconds.
SD	Surface day The voyage duration irrespective of time zones.
SI	Indefinite An indefinite period.
WD	Workday Day on which work is usually done.
WW	5 day work week Monday through Friday.
ZZZ	Mutually defined Period as per agreement.