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
