This documentation describes version 1.0 of the Open Archives API. The methods marked with an asterisk (*) require an API key, contact Open Archives to apply for one. All output is in UTF-8 and cached (server-side and via max-age header) for a day, unless otherwise specified.
API calls are throttled per IP address to 4 requests per second (Leaky Bucket).
Records presented on Open Archives all have an URI. This URI resolves to content based on content-negotiation.
Open Archives shares all the data in downloadable file exports (in CSV, XML and RDF).
Open Archives provides search results as defined by the Open Search specification. There's an OpenSearch description document for each language: NL, EN, DE & FR.
Open Archives also provides an OAI-PMH data provider for harvesting.
Find your ancestors and publish your family tree on Genealogy Online via https://www.genealogieonline.nl/en/