Thanks for your feedback! There is already a ticket about adding a new data type allowing to link EntitySchemas from statements: https://phabricator.wikimedia.org/T214884 If we don't encounter any major technical issue, this could be done in the incoming weeks.
On Tue, 28 May 2019 at 19:18, James Heald jpm.heald@gmail.com wrote:
Hi Léa,
Thanks to all the team for this.
I've proposed a property,
https://www.wikidata.org/wiki/Wikidata:Property_proposal/Shape_Expression_fo...
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 ?
Thanks,
James.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 <https://www.wikidata.org/wiki/Wikidata: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 <https://www.wikidata.org/wiki/Wikidata:WikiProject_ShEx/How_to_get_started%3...
- Phabricator tag: shape-expressions <https://phabricator.wikimedia.org/tag/shape_expressions/> - User script <https://www.wikidata.org/wiki/User:Zvpunry/EntitySchemaHighlighter.js%3E
to highlight items and properties in the schema code and turn theIDs into
linksIf you have any question or encounter issues, feel free to ping me.
Cheers,
Léa
On Sun, 19 May 2019 at 15:32, Léa Lacroix lea.lacroix@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>, definingthe
Schema namespace and its behavior as well as special pages relatedto 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 andaliases
(quite similar to the termbox on Items), and the schema text onecan 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...
is directly linked from the Schema pages in order to check entitiesof 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 ShapeExpressions
on our test system <https://wikidata-shex.wmflabs.org/wiki/Main_Page%3E
- 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 yourfavorite
wikiprojects: for example, what types of items would you like tomodel?
- You can also get more information about how to create a Schema <https://www.wikidata.org/wiki/Wikidata:WikiProject_ShEx/How_to_get_started%3...
*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%3E
to highlight items and properties in the schema code and turn theIDs into
linksIf 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
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.
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