OER - 5 Rs
All OER have these five permissions:
Retain - the right to make, own, and control copies of the resource;
Reuse - the right to use the content in a variety of ways;
Revise - the right to adapt, modify, adjust, change, or alter the content;
Remix - the right to combine the original or revised content with other material to make something new;
Redistribute - the right to share copies of the original content, your revisions, or your remixes with other people.