Erweiterung:EntitySchema

https://www.mediawiki.org/wiki/Extension:EntitySchema/de

Wikibase EntitySchema (E), Shape Expressions (ShEx)

The EntitySchema extension allows storing Shape Expressions Schemas on wiki pages (using ShExC syntax), as well as validating entities against those Schemas using the ShEx2 — Simple Online Validator. For more information on enabling this second part, see #Configuration.