setno: A number assigned to each IntCal dataset by the Intcal Working Group (IWG).
division: Structure assigned to datasets by the author. For example,
different trees or different coral locations
subdivision: Further structure imposed on a dataset by the IWG.
samid: sample id assigned to material by the author, for example to identify a piece of coral on which both carbon dates and uranium thorium dates were done.
labid: The identifier assigned by the radiocarbon laboratory.
calage: Calendar age estimate.
calspan: The number of calendar years spanned by the sample, for example the number of treerings used to make the c14 age measurement..
calsig: All uncertainties in the cal age added in quadrature.
c14age: Reservoir corrected radiocarbon age BP
c14sig: The uncertainty in the c14 age and its reservoir.