This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Incompatibilities And Licence Clauses.svg en Permissions requirements and prohibitions change open licences and stop them from interoperating Permissions ND No derivatives the can not derive new content from the resource Requirements BY By attribution the must attribute the source SA Sharealike if the adapts the resource it must