mkroetzsch added a comment. > @mkroetzsch Do you know of some widely used software that implements XSD 1.1 > handling of BCE dates?
Many applications that process dates are based on ISO rather than on XSD. Java's SimpleDateFormat class, for example, is based on ISO and thus interprets year numbers like XSD 1.1. I would assume that most time-processing applications, e.g., JavaScript timelines, use the same. Only XSD-based implementations tend to have legacy handling. For many RDF tools it is really hard to tell without digging into their code (usually they don't document this detail, and they use own implementations rather than relying on any XSD library). But I think it is fair to assume that ISO has a much larger market share, and that XSD 1.0 implementations will be updated at some point. > I think the best way forward is to leave the lexical 0 in the year fraction > as undefined in Wikidata. Yes its used, but AFAIK it was always undefined. Our original specification of Wikidata said: "The calendar model used for saving the data is always the proleptic Gregorian calendar according to ISO 8601". This is the specification that Denny and I support, but there have been changes recently. WMDE is currently in the process of reviewing these changes to gauge the impact they have had in the data over time, and to come up with ideas how to recover to a consistent state. We have to await their report and suggestions before deciding what to do in RDF. TASK DETAIL https://phabricator.wikimedia.org/T94064 REPLY HANDLER ACTIONS Reply to comment or attach files, or !close, !claim, !unsubscribe or !assign <username>. EMAIL PREFERENCES https://phabricator.wikimedia.org/settings/panel/emailpreferences/ To: Smalyshev, mkroetzsch Cc: Lydia_Pintscher, Denny, Manybubbles, daniel, mkroetzsch, Smalyshev, JanZerebecki, Aklapper, jkroll, Wikidata-bugs, Jdouglas, aude, GWicke _______________________________________________ Wikidata-bugs mailing list Wikidata-bugs@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikidata-bugs
