Copyright law is relevant for UGC both because UGC creators are themselves potential holders of rights in a new work and because UGC can result from the re-use of pre-existing works protected by copyright. It should be noted that, while no precise definition of UGC has yet been established, the mere sharing of existing copyright protected content (“file-sharing”) does not constitute the creation of a new work. Nor does it imply a transformative use. UGC creators should be able to claim and exercise their rights as creators if they wish to, and they should understand the rules that apply to works that include parts of works that are the fruit of others’ creativity and investment. Right holders in pre-existing works should also be able to exercise their rights, as for any other use of their work.