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startDayOfYear and endDayOfYear, year, month, day #133

Open tucotuco opened 5 years ago

tucotuco commented 5 years ago

Copied from https://github.com/tdwg/dwc/issues/223.

"Why has Darwin Core got startDayOfYear and endDayOfYear terms when these can be derived from eventDate? It is difficult to know how to determine these terms when eventDate is a range and spans more than a year.

Also, I can understand that Darwin Core needs month and day, because sometimes these data are available when the year is not. Apparently, ISO8601 does not support an unknown year (https://en.wikipedia.org/wiki/ISO_8601). However, this means the dwc:year is redundant, it can always be derived from dwc:eventDate.

What is the argument for keeping dwc:startDayOfYear, dwc:endDayOfYear and dwc:year?"

tucotuco commented 5 years ago

Answered in tdwg/dwc#223, but a wiki page to document eventDate-related topics should be made.