Peter, you might be looking for this:
https://www.mediawiki.org/wiki/Wikibase/DataModel#Dates_and_times Cheers, Denny On Wed, Jul 1, 2015 at 9:48 AM Peter F. Patel-Schneider < [email protected]> wrote: > Thanks. > > This helps in finding out how to reproduce the numbers. > > However, I'm still confused as to how these bits of data are part of the > Wikidata data/knowledge model. Where is the description of > getPreferredCalendarModel, for example? > > > http://javadox.com/org.wikidata.wdtk/wdtk-datamodel/0.1.0/org/wikidata/wdtk/datamodel/interfaces/TimeValue.html > Is a *partial* description of what is going on. Changes to this document > would be somewhat useful. However, what I'm really looking for is a > description of how time works in Wikidata. > > peter > > PS: I note that there are lots of aspects of TimeValue that are only > suitable for the Gregorian and Julian calendars. > > > > On 07/01/2015 09:24 AM, Markus Krötzsch wrote: > > On 01.07.2015 18:03, Peter F. Patel-Schneider wrote: ... > >> > >> Even the very nice email from Markus that gives numbers does not > >> provide any information on where the numbers come from. > > > > I just ran a simple Java program based on Wikidata Toolkit to count the > > date values. The features I used for counting are all part of the data > > (concretely I accessed: year number, precision, and calendar model). I > > used the JSON dump of 22 June 2015. The program counted all dates that > > occur in any place (main values of statements, qualifiers, and > > references). No other special processing was done. > > > > Below is the main code snippet that did the counting, in case my > > description was too vague. If you want to get your own numbers, it does > > not require much (I just modified one of the example programs in Wikidata > > Toolkit that gathers general statistics). Running the code took about > > 25min on my laptop (the initial dump download took longer though). The > > SPARQL endpoint at https://wdqs-beta.wmflabs.org/ should also return > > useful counts if it does not time out on the very large numbers. It uses > > life data. > > > > Best regards, > > > > Markus > > > > > > // after determining that snak is of appropriate type: String cm = > > ((TimeValue) ((ValueSnak) snak).getValue()) > > .getPreferredCalendarModel(); if (TimeValue.CM_GREGORIAN_PRO.equals(cm)) > > { this.countGregDates++; } else if (TimeValue.CM_JULIAN_PRO.equals(cm)) > > { this.countJulDates++; } else { System.err.println("Weird calendar > > model: " + ((ValueSnak) snak).getValue()); } > > > > if (((TimeValue) ((ValueSnak) snak).getValue()).getPrecision() <= > > TimeValue.PREC_MONTH) { return; } > > > > long year = ((TimeValue) ((ValueSnak) snak).getValue()).getYear(); if > > (year >= 1923) { this.countModernDates++; } else if (year >= 1753) { > > this.countAlmostModernDates++; } else if (year >= 1582) { > > this.countTransitionDates++; } else { this.countOldenDates++; } > > > > > > _______________________________________________ Wikidata mailing list > > [email protected] > > https://lists.wikimedia.org/mailman/listinfo/wikidata > > _______________________________________________ > Wikidata mailing list > [email protected] > https://lists.wikimedia.org/mailman/listinfo/wikidata >
_______________________________________________ Wikidata mailing list [email protected] https://lists.wikimedia.org/mailman/listinfo/wikidata
