Wonderful! Awesome! Thank you very much, Léa, to announce us this arrival. And, of course, thank you to everyone who is working in this project.
I think ShEx is going to help to make the data of Wikidata more consistent and trustworthy. I am wishing to learn how to create and use this ShEx schemas! Regards, Iván On 19/5/19 14:32, Léa Lacroix 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 > <http://test.wikidata.org> on May 21st and on wikidata.org > <http://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 > 10963 Berlin > www.wikimedia.de <http://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 > [email protected] > https://lists.wikimedia.org/mailman/listinfo/wikidata > -- Iván Hernández Cazorla Historiador e interesado en las humanidades digitales Miembro de Wikimedia España https://ivanhercaz.com | https://keybase.io/ivanhercaz
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