A royalty (sometimes, running royalties, or private sector taxes) is a usage-based payment made by one party (the "licensee") to another (the "licensor") for the right to ongoing use of an asset, sometimes an intellectual property (IP). Royalties are typically agreed upon as a percentage of gross or net revenues derived from the use of an asset or a fixed price per unit sold of an item of such, but there are also other modes and metrics of compensation. A royalty interest is the right to collect a stream of future royalty payments, often used in the oil and music industries to describe a percentage ownership of future production or revenues from a given leasehold, which may be divested from the original owner of the asset. A license agreement defines the terms under which a resource or property such as petroleum, minerals, patents, trademarks, and copyrights are licensed by one party to another, either without restriction or subject to a limitation on term, business or geographic territory, type of product, etc. License agreements can be regulated, particularly where a government is the resource owner, or they can be private contracts that follow a general structure. However, certain types of franchise agreements have comparable provisions.