Topic: What exactly do the dateTypekey values mean?
So I see there's a field "dateTypekey" in the records.
With values that can be:
D, DD, Y, YY, O, OO, -Y, ND, U, P
(empirically determined by examining lots of records)
But what do those values actually mean or indicate about the date type? It's not obvious to me.
I have tried hard to find a full explanation of dateTypekey or a clear and detailed guide to the NBN data exchange format but have found none. Closest I got was this forum link which had someone asking a similar question to the one I'm asking now: forums.nbn.org.uk/viewtopic.php?id=5825
Can anyone explain each of those dateTypekey values to me, or point me to a useful explanatory link?