SPARQL Endpoint & Federation
The Artsdata.ca SPARQL endpoint is mainly used internally due to the complexity of writing SPARQLs.
The default SPARQL endpoint is: https://query.artsdata.ca/sparql. This endpoint only queries the Artsdata core graph.
To query across all data feeds and core graphs, you can use this other SPARQL endpoint: https://db.artsdata.ca/repositories/artsdata.
For example SPARQL query see this query of Places with an Artsdata ID.
Wikidata Interlinking
Artsdata.ca has created property P7627 in Wikidata for linking entities from Wikidata to Artsdata.ca