But the project has problems with legacy IPR attached to music and performers in programmes and many items are incomplete because of this. However their licence to reuse content is closely based on that outlined in the Creative Commons44 licensing system - which allows for various stages of reuse. The Creative Commons initiative was born out of the necessity to adapt to the sudden ability to use, re-master and share digital materials. It provides a legal mechanism to allow publishers to decide how their content can be used, distributed or reused. It is used on several sites that have media repositories.