Wow this sounds great! I would love to use this for oeuvre catalogs of top painters! The latest Rembrandt catalog is complete on Wikidata, as well as a few other ones, but older ones are not yet complete. This could be a great tracking tool for WikiProjects.
On Wed, Mar 2, 2016 at 10:17 AM, Darari Fariz < [email protected]> wrote: > Hello Wikidata community! Wikidata is a great platform for collecting > information, and the high quality work of many authors yields very reliable > information. Still, a challenge for users of Wikidata is that there is no > way to see whether *all* data on a certain topic is in Wikidata. For > instance, it is easy to see that Malia and Sasha are children of Obama, but > there is no way to specify that these are all his children. More generally, > Wikidata stores many facts, but it stores no information about which topic > it contains all facts. Today we are happy to share with you a prototype > that allows to add and manage such completeness information, and would be > happy to get your feedback on how useful you consider this tool, or where > you see space for improvements. With our prototype, called COOL-WD > (Completeness Tool for Wikidata), one can: 1. See completeness statements > for Wikidata facts 2. Add, remove, aggregate and filter completeness > statements 3. See how completeness statements allow conclusions about the > completeness of SPARQL queries over Wikidata. COOL-WD is available at > http://cool-wd.inf.unibz.it/ and a 3-min demo video can be found at > http://cool-wd.inf.unibz.it/coolwd-hd.mp4 It employs various libraries, > most importantly GWT, Apache Jena, SQLite and the Wikidata API. The formal > background and description of the tool including an indexing technique for > completeness statements have been accepted as a research paper at ICWE 2016 > (http://icwe2016.inf.usi.ch/) available to download at: > http://bit.ly/1VOsRCH Below are some naive ideas of how completeness > could be useful to users: > Use Case 1: Rido is a geographer who would like > to contribute to Wikidata about the administrative divisions of regions. He > cares so much about data quality, especially data completeness, and is > collaborating with Simon, another geographer. However, when completing data > on Wikidata, there is currently no way to mark which data is complete. Rido > and Simon must make these notes about completeness manually in, say, a > Google Doc. Worse still, the effort from Rido and Simon to complete data > could not be appreciated by Wikidata users since to the users’ eyes, there > is no difference between complete data and incomplete data on Wikidata. > Demo: Wikidata is complete for all administrative divisions of Saxony ( > http://cool-wd.inf.unibz.it/?p=Q1202) > Use Case 2: Jen is a developer of > a moviegoer application. She usually integrates data between multiple > sources including Wikidata. If some movies on Wikidata have completeness > statements, she might optimize her application to not search in other data > sources for those movies. Demo: So, when her app is asking on COOL-WD at > http://cool-wd.inf.unibz.it/?p=query for cast and screenwriters of the > movie Before Sunset (http://cool-wd.inf.unibz.it/?p=Q652186): SELECT * > WHERE { wd:Q652186 wdt:P161 ?c . wd:Q652186 wdt:P58 ?s } Her app gets not > only query answers but also the completeness information of her query. We > are looking forward to your feedback! Best, Fariz, Simon, Rido, and Werner > Free University of Bozen-Bolzano, Italy > > _______________________________________________ > Wikidata mailing list > [email protected] > https://lists.wikimedia.org/mailman/listinfo/wikidata > >
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