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Appendix II: Licenses

This section lists a number of common licenses for datasets and defines suggested abbreviations for use in the dataset metadata specifications

Identifier License name Description
PD Public Domain No license required for any purpose; the work is not subject to copyright in any jurisdiction.
PDDL Open Data Commons Public Domain Dedication and License License to assign public domain like permissions without giving up the copyright:
CC0 Creative Commons Zero 1.0 Universal. Use this if you are a holder of copyright or database rights, and you wish to waive all your interests in your work worldwide: