Terms for absolute geological dates/ages

[dennereed]

Add terms for absolute minimum and maximum dates for a specimen; e.g. minimumAge, maximumAge? Was this considered before? If so why omitted?

[hollyel]

I'm not sure about the history of whether or not this type of data was considered, but there is a proposed set of terms for chronology that was presented by @lbrensk at TDWG this year.

https://doi.org/10.3897/tdwgproceedings.1.20126

[lbrensk]

Hey! Yes, we have been working on a chronometric dating extension for reporting absolute dates. We’ve published this work on GitHub here: https://github.com/VertNet/dwc-chronology

You can view the terms and their definitions specifically here: https://github.com/VertNet/dwc-chronology/blob/master/standard/vocabularies/term_versions.csv

We are in the process right now of getting this extension into the IPT sandbox so we can publish a data set (or a few) using it. We are also planning a Darwin Core Hour, tentatively slated for sometime in January, where we can discuss the problems associated with reporting dates as a broader community. Please feel free to take a look at the terms, ask any questions, or give feedback. I presented an example of how these would work in my TDWG Talk this year so that is also available, if not from an iDigBio archive of the meeting, then in my own personal files.

[tucotuco]

The Chronometric Age Extension has passed public review and will now be presented to the Executive Committee for ratification. I believe this issue can be closed.

[tucotuco]

The ChronometricAge vocabulary enhancement has now been ratified. Please close this issue.