What is the difference between a copyright and a license?
A copyright gives the creator the rights to control how a work is reproduced, copied, distributed, made into derivative works, and publicly displayed, or publicly performed. A license is a contract a copyright holder creates to restrict use or require additional actions to use a work for a predetermined amount of time. You can license any or all of these rights for any amount of duration. In some cases, as in open source code, your use of the work binds you to the license whether you know about it or not.
