https://opendatacommons.org
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Summary
This organization provides legal tools and licenses designed to facilitate the publication, provision, and use of open data. It offers specific licenses such as the Open Database License (ODbL), the Attribution License, and the Public Domain Dedication and License (PDDL). Additionally, it serves as a resource for understanding open data, its definitions, and its applications, while also maintaining a service for accessing data on various open source and open content licenses.