eventID: an identifier for the set of information associated with an Event; may be a global unique identifier or an identifier specific to the data set.
parentEventID*: an identifier for the broader Event that groups this and potentially other Events. May be a globally unique identifier or an identifier specific to the data set.
samplingProtocol: the name of, reference to, or description of the method or protocol used during a sampling event.
sampleSizeValue*: a numeric value for a measurement of the size (time duration, length, area, or volume) of a sample in a sampling event. A sampleSizeValue must have a corresponding sampleSizeUnit.
sampleSizeUnit*: the unit of measurement of the size (time duration, length, area, or volume) of a sample in a sampling event. A sampleSizeUnit must have a corresponding sampleSizeValue.
organismQuantity*: a number or enumeration value for the quantity of organisms. An organismQuantity must have a corresponding organismQuantityType.
organismQuantityType*: the type of quantification system used for the quantity of organisms. An organismQuantityType must have a corresponding organismQuantity