Open Archives also publishes its aggregated genealogical archive data as Linked Open Data. Below are the SPARQL endpoints on which this data can be queried, each with a service description and a data dump.
| Status | Dataset | # triples | Endpoint | Links |
|---|---|---|---|---|
| Open Archives records (A2A) All records and person observations of the archives aggregated by Open Archives, in the A2A/CIV model. | ? | https://sparql.openarchieven.nl/oa-a2a | YASGUI Service description Data dump Documentation Example | |
| Open Archives records (PiCo) The same records and person observations, converted to the Persons in Context (PiCo) model. | ? | https://sparql.openarchieven.nl/oa-pico | YASGUI Service description Data dump Documentation | |
| Open Archives person reconstructions (PiCo) Person reconstructions of historical individuals based on mentions in records on Open Archives, in the PiCo model. | ? | https://sparql.openarchieven.nl/oa-pico-recon | YASGUI Service description Data dump Documentation |
The endpoints follow the SPARQL 1.1 Protocol: send a query as GET ?query=... or as POST. Pick the result format with the Accept header (JSON, CSV, TSV, XML, Turtle or N-Triples).
curl -H "Accept: text/csv" \
--data-urlencode "query=SELECT ?class (COUNT(?s) AS ?count) WHERE { ?s a ?class } GROUP BY ?class ORDER BY DESC(?count)" \
https://sparql.openarchieven.nl/oa-pico-recon
A bare GET on the endpoint URL, without a query, returns the service description in Turtle.
curl -H "Accept: text/turtle" https://sparql.openarchieven.nl/oa-pico-recon
The endpoints run on QLever. For every endpoint you can open a YASGUI query editor via the button in the table.
See also the page about URI and Content Negotiation.
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