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Licence/Licence Compatibility: Difference between revisions
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When material is in the "Public Domain" this indicates that there is an absence of intellectual property and related rights in the material. This in general is true when such rights have expired or other specific legal conditions arise (for example for data published by the US federal government). "PD" data is in general compatible with OpenStreetMap however care must be taken to verify that it is actually in the Public Domain and that no third party rights are present (which for example might be the case in data produced in a "public-private partnership").
==== Open Government Licence (OGL) based terms ====
The [http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/ Open Government Licence] is a licence originally created by the UK government, in its 2.0 and 3.0 versions it is compatible with OpenStreetMap. However the same caveats as for CC0 apply, the licence explicitly excludes rights in third party data and therefore you need to take the same steps as you would for CC0 licenced material.
The concerns about the inclusion of potentially unlicensed third party data are not unfounded, such a situation was partly responsible for the demise of the openaddresses.co.uk project.
Many governments at every level of administration worldwide (for example Canada) have created there own variants of the OGL, or have simply named an unrelated licence the same. Such variants need to be inspected in respect to which version of the OGL they were originally based (the OGL 1.0 had incompatible attribution terms) and changes to the text. For example it is common to reference local FOIA and privacy regulation, which can be unproblematic depending on the actual contents of the data. For example such a licence for an address dataset would likely require reviewing any referenced privacy regulation.
==== CC BY ====
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