Under the Copyright Design and Patent Act 1988, copyright infringement covers not only copying (primary infringement) but also knowingly dealing commercially in infringing copies (secondary infringement) as well as assisting in primary and secondary infringement. Copyright may be infringed by copying all or a substantial part (judged in terms of quality and quantity) of a work. Certain copying is not infringement i.e if for private study, criticism or fair dealing - e.g. for pure research.
Infringement occurs through usage of a substantial amount of a copyrighted work without consent for purposes other than those outlined in the statutory doctrine of fair usage. See " copyright, fair usage ."
Copyright infringement (or copyright violation) is the unauthorized use of material protected by intellectual property rights law, specifically copyright law, in a manner that violates one of the original copyright owner's exclusive rights, such as the right to reproduce or perform the copyrighted work, or to make derivative works that build upon it. The slang term bootleg (derived from the use of the shank of a boot for the purposes of smuggling) is often used to describe illicitly copied material.