In law, intellectual property (IP) is an umbrella term for various legal entitlements which attach to certain names, written and recorded media, and inventions. The holders of these legal entitlements may exercise various exclusive rights in relation to the subject matter of the IP. The adjective "intellectual" reflects the fact that this term concerns a process of the mind. The noun "property" implies that ideation is analogous to the construction of tangible objects. Consequently, this term is controversial.Intellectual property laws and enforcement vary widely from jurisdiction to jurisdiction. There are inter-governmental efforts to harmonise them through international treaties such as the 1994 World Trade Organization (WTO) Agreement on Trade-Related Aspects of Intellectual Property Rights (TRIPs), while other treaties may facilitate registration in more than one jurisdiction at a time. Disagreements over medical and software patents and the severity of copyright enforcement have so far prevented consensus on a cohesive international system.