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No type definition was found for "Gathering-DateTime-DayNumberBegin" in the abcd2 import.
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Gathering-DateTime-DayNumberBegin (also /DataSets/DataSet/Units/Unit/Gathering/DateTime/DayNumberBegin): The Julian day number (or sequential day) in the year for the exact date or for the first day of the gathering event. The year is given in ISO-Date-Time-Begin.

The content range is 1-365 for normal years, 366 for leap years.

Maps to Darwin Core 2: Julian Day.

Constraints in the context of ABCD 2:

ABCD2 Hierarchy

XPath Segments: /DataSets /DataSet /Units /Unit /Gathering /DateTime /DayNumberBegin