Great tool ! The error detection is precious ! 2015-10-22 17:31 GMT+02:00 Markus Kroetzsch <[email protected]> :
> Hi all, > > I am happy to announce a new tool [1], written by Serge Stratan, which > allows you to browse the taxonomy (subclass of & instance of relations) > between Wikidata's most important class items. For example, here is the > Wikidata taxonomy for Pizza (discussed recently on this list): > > > http://sergestratan.bitbucket.org?draw=true&optid=s0&item=177,2095,7802,28877,35120,223557,386724,488383,666242,736427,746549,2424752,15222213,16686448 > > > == What you see there == > > Solid green lines mean "subclass of" relations (subclasses are lower), > while dashed purple lines are "instance of" relations (instances are > lower). Drag and zoom the view as usual. Hover over items for more > information. Click on arrows with numbers to display upper or lower > neighbours. Right-click on classes to get more options. > > The sidebar on the left shows statistics and presumed problems in the data > (redundancies and likely errors). You can select a report type to see the > reports, and click on any line to show the error. If you search for a class > in the search field, the errors will be narrowed down to issues related to > the taxonomy of this class. > > The toolbar at the top has options to show and hide items based on the > current selection (left click on any box). > > Edges in red are the wrong way around (top to bottom). This occurs only > when there are cycles in the "taxonomy". > > > == Micro tutorial == > > (1) Enter "Unicorn" in the search box, press return. > (2) Zoom out a bit by scrolling your mouse/touchpad > (3) Click on the "Unicorn" item box. It becomes blue (selected). > (4) Click "Expand up" in the toolbar at the top > (5) Zoom out to see the taxonomy of unicorn > (6) Find the class "Fictional Horse" (directly above unicorn) and click > its downwards arrow labelled "3" to see all three children items of > "fictional horse". > (7) Click the share button on the top right to get a link to this view. > > You can also create your own share link manually by just changing the Qids > in the URL as you like. > > > == Status and limitations == > > This is a prototype and it still has some limits: > > * It only shows "proper" classes that have at least one instance or > subclass. This is to reduce the overall data size and load time. > * The data is based on dumps (the date is shown on the right). It is not a > live view. > * The layout is sometimes too dense. You can find a "hidden" option to > make it more spacy behind the sidebar (click "Sidebar" to see it). This > helps to disentangle larger graphs. > * There are some minor bugs in the UI. You sometimes need to click more > than once until the right thing happens. > * The help page at http://sergestratan.bitbucket.org/howtouse.html does > not explain everything in detail yet. > > It is planned to work on some of these limitations in the future. > > The hope is that this tool will reveal many errors in Wikidata's taxonomy > that are otherwise hard to detect. For example, you can see easily that > every "Ship" is an "Event" in Wikidata, that every "Hobbit" is a "Fantasy > Race", and that every "Monday" is both a "Mathematical object" and a "Unit > of measurement". > > Feedback is welcome (on the tool; better start new threads for feedback on > the Wikidata taxonomy ;-), > > Markus > > > [1] http://sergestratan.bitbucket.org > > -- > Markus Kroetzsch > Faculty of Computer Science > Technische Universität Dresden > +49 351 463 38486 > http://korrekt.org/ > > _______________________________________________ > Wikidata mailing list > [email protected] > https://lists.wikimedia.org/mailman/listinfo/wikidata >
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