Wikidata (Wikimedia Foundation)
The free knowledge base of the Wikimedia projects, maintained by volunteers. Links items to the IDs of thousands of other registers, including Dutch ones (CBS, RCE, KvK). Data under CC0.
What they publish
Counted across all indexes we harvest.
Where it is
- NDE Datasetregister1
Formats
Sources explained
Wikidata
Wikidata is the free knowledge base behind Wikipedia: millions of items (people, places, buildings, organisations, artworks) with properties and sources, and above all with the IDs other registers use. For the Netherlands these include national monument numbers (P359), CBS municipality codes (P382) and KvK company IDs (P3220). This lets you join datasets that have no common key of their own. Everything is CC0. Note: robots.txt disallows bots on the SPARQL service and the APIs, so the Open Data Index does not query Wikidata itself.