We have some discussions about the need in OBIS: https://github.com/iobis/quality-taskteam/issues/35 

There is a similar term in cam trap-dp: https://github.com/tdwg/camtrap-dp/issues/217, https://tdwg.github.io/camtrap-dp/data/#observations.classificationconfidence 

My concern is will this vary across different taxa? If so, how to document this at Event level? (since Humboldt is an extension to the Event?) Maybe it’s a term to be proposed for Identification class?

Looking at the terms again, I have some concern about the amount of boolean terms that is dependent on other table such as the Event core table and Occurrence extension table. For example, hasMaterialSample, isAbundanceReported, isAbsenceReported. On average, I work with 3 tables (excluding Humboldt). I think it is a little error prone to have the fields dependent on other table IF it is something that can be derived. The reason is, data provider often change things in different tables and that including the IDs (eventID, occurrenceID). It is very common that information on one table is updated but not the other. In my experience, many data providers are still using spreadsheet, so I am a little worried that these fields may lead to inconsistencies or people will not use it because it is a lot of work.  

isAbundanceReported - if there is a value in individualCount or organismQuantity, organismQuantityType of the occurrence records of the Event, would that perhaps sufficient to imply that the abundance is reported? (Please correct me if I am wrong)

isAbsenceReported - same as above, but looking at occurrenceStatus column.

hasMaterialSample - same as above, but looking at the MaterialSampleID column. If materialSampleTypes (Humboldt term) has a value, then perhaps that is sufficient to imply that hasMaterialSample is true?

I hope I am making sense~ Thank you all very much for the hard work! 

Sincerely

Ming