copyright is a type of intellectual properly which grants the owner of the copyright exclusive rights to control how their work is used,reproduced and credited ,as well a compensation in association with any use or reproduction of their work.

NoDerivatives(ND)没有衍生产品

What is an open licence?
Open content, including Open Educational Resources (OER), can be described as legally free. This legal freedom is expressed through a licence 一 called an open licence 一 through which the copyright holder grants permission to use, access and re一distribute work with few restrictions. For example, a set of lesson plans made available under a Creative Commons open licence on a website means that anybody is free to view, print and share the work. The majority of Creative Commons licences also provide permission to adapt and change the work, and share your adapted content online or in print.