Map deploymentID to parentEventID

[peterdesmet]

Discussed with @ben-norton.

I suggest to map deploymentID to dwc:parentEventID rather than dwc:eventID:

An identifier for the broader Event that groups this and potentially other Events.

Deployments are events of course, so the current mapping to dwc:eventID is not wrong. But by suggesting the mapping to dwc:parentEventID it will be clearer to users how to do this mapping in Darwin Core. Mapping ~~sequenceID~~ eventID to dwc:eventID and deploymentID to dwc:parentEventID is 1) the only way to include both terms in a flat Occurrence Core and 2) indicates to data users that deployments do in fact group sequences.

I would only indicate this mapping in the tables where deploymentID occurs together with ~~sequenceID~~ eventID, so:

# deployments resource
deploymentID -> eventID

# media resource
deploymentID -> parentEventID
eventID -> eventID
mediaID -> identifier # no more specific term available

# observations resource
eventID -> eventID
observationID -> occurrenceID

@tucotuco any thoughts/objections?

[tucotuco]

I have no objections whatever.