data.europa.eu
data.europa.eu brings together open data published across Europe, from national and regional portals to the EU institutions themselves. It acts as a catalogue, describing each dataset and linking out to where the data lives.
With over 1.6 million datasets across dozens of countries and languages, coverage is wide: economics, transport, health, the environment, agriculture, and more. Data comes in formats such as CSV, JSON, and XML, and a good share is published as linked data (RDF), a way of describing facts as connected statements that machines can follow and query.
Most datasets are released under CC BY 4.0, so you can reuse them with attribution. If you are building a RAG system that needs to answer questions across European countries, this portal saves you from hunting through dozens of national sites.
Related sources
Companies House
The UK's official register of companies. Search every registered company, its directors, filing history, and accounts, or pull the data in bulk. A reliable source for UK corporate facts in a RAG system.
data.gov
The US federal government's open data portal, gathering more than 300,000 datasets from federal agencies. Coverage spans agriculture, climate, education, energy, finance, health, and public safety, making it a broad source of official US data for RAG systems.
data.gov.uk
The UK Government's central catalogue of open public sector data, run by the Government Digital Service. More than 47,000 datasets cover health, housing, transport, demographics, and the environment, giving RAG systems a trusted base of UK facts, figures, and official records.
Hansard
The official word-for-word record of proceedings in the UK Parliament, both the Commons and the Lords. Full text searchable and available as XML and linked data going back centuries, it is a rich source of political and legislative debate for RAG systems.