implement EDTF for sortdate?

[GVogeler]

The EDTF expresses many typical cases of historical data and has been integreated into ISO 8601.2019. Implementation in databases is still rather fragmentary. Would it already make sense to define sortdate as EDTF?

[StefanDumont]

I think EDTF is still very problematic at the moment - especially for an API format - because of the lack of implementation. We at correspSearch, for example, would probably have to implement it expensively or restrict the offered API in comparison to the standard. If the situation should be different, one could expand the definitition without problems in the future.