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Schema of the ODH VKG

The Open Data Hub Virtual Knowledge Graph is available as a SPARQL endpoint. Here we describe its schema (its structure).

How to read the diagrams

Default prefix

By default, classes and properties use http://schema.org/ as prefix.

NB: you can dereference the URLs of classes and properties to see their official documentation. For instance, have a look at http://schema.org/Hotel.

Arrows

Black arrows are for object properties. White arrows denotes a sub-class relationship.

Cardinalities

Cardinalities are provided by data and object properties. Cardinalities of 1 are kept most of the time implicit, expect for highlighting something counter-intuitive.

Cardinalities of object properties follow the "look across" notation like in UML diagrams.

For instance, in the accommodation diagram, for each Accommodation instance, there is exactly one LodgingBusiness instance accessible through the object property schema:containedInPlace. On the opposite direction, for each LodgingBusiness instance there are 0 or n instances of Accommodation that points to it through the object property schema:containedInPlace.

Accommodation

Accommodation diagram

Food establishments

Food establishment diagram

Events

Event diagram