Open data (ODC-By-1.0)

Open data is data published under a license that lets anyone freely access, reuse and redistribute it, typically requiring only attribution. A common license for databases is ODC-By-1.0, the Open Data Commons Attribution License, maintained by Open Data Commons (a project of the Open Knowledge Foundation). It grants a worldwide, royalty-free, perpetual license to copy, modify and build on a database — including commercially — with attribution as the sole obligation, and prohibits sublicensing or adding further restrictions.

For AI visibility, open data removes legal and technical friction: engines can ingest and cite it without barriers, and the openness makes the data auditable. ODC-By is recognized by SPDX (identifier ODC-By-1.0) and certified by the Open Definition. Note its scope is the database and its structure, not the individual copyrighted contents, trademarks or software, which may need separate licensing. Wispra publishes its directory under ODC-By-1.0, which is also what makes its neutrality verifiable.