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Open Data Commons is the home of a set of legal tools and licenses to help you publish, provide and use open data.

Learn more about how to apply the licenses to your material:

• Open Data Commons Open Database License (ODbL)
• Open Data Commons Attribution License
• Open Data Commons Public Domain Dedication and License (PDDL)

To discover more about open data and content, use these resources:

• What is open data and how does it relate to open knowledge? Consult our guide
• How is “openness” defined in relation to data and content? Read the Open Definition
• Have more detailed questions about the Open Data Commons licenses? Our frequently asked questions may provide answers
• Use the Licenses Service to get data on more than 100 open source, open data and open content licenses in JSON and API friendly form

Open Data Commons is maintained by the Open Knowledge Foundation. If you have any questions, join our discussion forum or email [email protected] to contact our team.