In other words: the benefits of standardized schemata but with less gatekeeping and exclusivity. Cheers!
On Sun, May 19, 2019 at 3:32 PM Léa Lacroix <lea.lacr...@wikimedia.de> wrote: > Hello all, > > After several months of development and testing together with the WikiProject > ShEx <https://www.wikidata.org/wiki/Wikidata:WikiProject_ShEx>, Shape > Expressions are about to be enabled on Wikidata. > *First of all, what are Shape Expressions?* > > ShEx (Q29377880) <https://www.wikidata.org/wiki/Q29377880> is a concise, > formal modeling and validation language for RDF structures. Shape > Expressions can be used to define shapes within the RDF graph. In the case > of Wikidata, this would be sets of properties, qualifiers and references > that describe the domain being modeled. > > See also: > > - a short video about ShEx > <https://www.youtube.com/watch?v=AR75KhEoRKg> made by community > members during the Wikimedia hackathon 2019 > - introduction to ShEx <http://shex.io/shex-primer/> > - more details about the language <http://shex.io/shex-semantics/> > > *What can it be used for?* > > On Wikidata, the main goal of Shape Expressions would be to describe what > the basic structure of an item would be. For example, for a human, we > probably want to have a date of birth, a place of birth, and many other > important statements. But we would also like to make sure that if a > statement with the property “children” exists, the value(s) of this > property should be humans as well. Schemas will describe in detail what is > expected in the structure of items, statements and values of these > statements. > > Once Schemas are created for various types of items, it is possible to > test some existing items against the Schema, and highlight possible errors > or lack of information. Subsets of the Wikidata graph can be tested to see > whether or not they conform to a specific shape through the use of > validation tools. Therefore, Schemas will be very useful to help the > editors improving the data quality. We imagine this to be especially useful > for wiki projects to more easily discuss and ensure the modeling of items > in their domain. In the spirit of Wikidata not restricting the world, Shape > Expressions are a tool to highlight, not prevent, errors. > > On top of this, one could imagine other uses of Schemas in the future, for > example building a tool that would suggest, when creating a new item, what > would be the basic structure for this item, and helping adding statements > or values. A bit like this existing tool, Cradle > <https://tools.wmflabs.org/wikidata-todo/cradle/#/>, that is currently > not based on ShEx. > *What is going to change on Wikidata?* > > - A new extension will be added to Wikidata: EntitySchema > <https://www.mediawiki.org/wiki/Extension:EntitySchema>, defining the > Schema namespace and its behavior as well as special pages related to it. > - A new entity type, EntitySchema, will be enabled to store Shape > Expressions. Schemas will be identified with the letter E. > - The Schemas will have multilingual labels, descriptions and aliases > (quite similar to the termbox on Items), and the schema text one can fill > with a syntax called ShEx Compact Syntax (ShExC) > <http://shex.io/shex-semantics/#shexc>. You can see an example here > <https://wikidata-shex.wmflabs.org/wiki/EntitySchema:E2>. > - The external tool shex-simple > > <https://tools.wmflabs.org/shex-simple/wikidata/packages/shex-webapp/doc/shex-simple.html?schemaURL=https%3A%2F%2Fwikidata-shex.wmflabs.org%2Fwiki%2FSpecial%3AEntitySchemaText%2FE2> > is directly linked from the Schema pages in order to check entities of your > choice against the schema. > > *When is this happening?* > > Schemas will be enabled on on test.wikidata.org on May 21st and on > wikidata.org on May 28th. After this release, they will be integrated to > the regular maintenance just like the rest of Wikidata’s features. > *How can you help?* > > - Before the release, you can try to edit or create Shape Expressions > on our test system <https://wikidata-shex.wmflabs.org/wiki/Main_Page> > - If you find any issue or feature you’d like to have, feel free to > create a new task on Phabricator with the tag shape-expressions > - Once Schemas are enabled, you can discuss about it on your favorite > wikiprojects: for example, what types of items would you like to model? > - You can also get more information about how to create a Schema > > <https://www.wikidata.org/wiki/Wikidata:WikiProject_ShEx/How_to_get_started%3F> > > *See also: * > > - Main Phabricator board > <https://phabricator.wikimedia.org/tag/shape_expressions/> > - Technical documentation of the extension > <https://meta.wikimedia.org/wiki/Extension:EntitySchema> > - To enhance the interface, you can use this user script > <https://www.wikidata.org/wiki/User:Zvpunry/EntitySchemaHighlighter.js> > to highlight items and properties in the schema code and turn the IDs into > links > > If you have any questions, feel free to reach me. Cheers, > -- > Léa Lacroix > Project Manager Community Communication for Wikidata > > Wikimedia Deutschland e.V. > Tempelhofer Ufer 23-24 > <https://maps.google.com/?q=Tempelhofer+Ufer+23-24+10963+Berlin&entry=gmail&source=g> > 10963 Berlin > <https://maps.google.com/?q=Tempelhofer+Ufer+23-24+10963+Berlin&entry=gmail&source=g> > www.wikimedia.de > > Wikimedia Deutschland - Gesellschaft zur Förderung Freien Wissens e. V. > > Eingetragen im Vereinsregister des Amtsgerichts Berlin-Charlottenburg > unter der Nummer 23855 Nz. Als gemeinnützig anerkannt durch das Finanzamt > für Körperschaften I Berlin, Steuernummer 27/029/42207. > _______________________________________________ > Wikidata mailing list > wikid...@lists.wikimedia.org > https://lists.wikimedia.org/mailman/listinfo/wikidata > -- -- *James Hare* (he/him) Associate Product Manager Wikimedia Foundation <https://wikimediafoundation.org/>
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