| Jc3s5h added a comment. |
In T95553#4430864, @Jc86035 wrote:(My earlier description edits were incorrect and were based on a bad interpretation of the project chat discussion with complaints about external tools. The thing that causes the issue is that some software doesn't realize that Wikibase has nonstandard date handling and has slightly different ranges for centuries and millennia.)
I would say rather that most of Wikibase follows much of ISO 8601:2004, and in particular, follows that standard with respect to centuries, for example, when 4 digit years are being used, the precision is century, and the first two digits of the year are 20, then the date could be anywhere from 1 January 2000 to and including 31 December 2099. So most of Wikibase follows a widely used standard. But the user interface is inconsistent with the rest of the Wikibase code and documentation.
External code does not interact through the user interface. Whether the external code correctly follows the Wikibase standards, as documented in the data models, would depend on whether the external code was developed by reading the data models, or empirically by looking at data present in the database. If the data that the external developers happened to have incorrect information due to the faulty user interface, the external code might be faulty as well.
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