Very interesting as Wikidata starts beeing part of more external data “flows” I would also like to see that we easy can tell
* this is the schema we use inside Wikidata
* this is external related schemas other organisations has created for this type of data
* how this WD schema relate to an external schema. What parts we map etc.
In Sweden the goverment speaks about basic data (swe. Grunddata) that they will define that I hope the data in Wikidata can “plug-in” and add value to.
If we don't encounter any major technical issue, this could be done in the incoming weeks.
Thanks to all the team for this.
I've proposed a property,
To make this work, is it possible to have a Shape Expression as the
value of a statement on Wikidata (and the RDF dump, and WDQS) ?
Is there a timescale in which this should become possible ?
On 28/05/2019 17:04, Léa Lacroix wrote:
> Hello all,
> As previously announced, we just released shape expressions on Wikidata.
> You can for example have a look at E10, the shape for human
> <https://www.wikidata.org/wiki/EntitySchema:E10>, or create a new
> EntitySchema <https://www.wikidata.org/wiki/Special:NewEntitySchema>.
> A few useful links:
> - WikiProject ShEx
> - introduction to ShEx <http://shex.io/shex-primer/>
> - more details about the language <http://shex.io/shex-semantics/>
> - More information about how to create a Schema
> - Phabricator tag: shape-expressions
> - User script
> to highlight items and properties in the schema code and turn the IDs into
> If you have any question or encounter issues, feel free to ping me. Cheers,
> On Sun, 19 May 2019 at 15:32, Léa Lacroix <email@example.com> 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
>> 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
>> - The external tool shex-simple
>> 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
>> *See also: *
>> - Main Phabricator board
>> - Technical documentation of the extension
>> - To enhance the interface, you can use this user script
>> to highlight items and properties in the schema code and turn the IDs into
>> 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
>> 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
Project Manager Community Communication for Wikidata
Wikimedia Deutschland e.V.
Tempelhofer Ufer 23-24
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.