Land law is the form of law that deals with the rights to use, alienate, or exclude others from land. In many jurisdictions, these kinds of property are referred to as real estate or real property, as distinct from personal property. Land use agreements, including renting, are an important intersection of property and contract law. Encumbrance on the land rights of one, such as an easement, may constitute the land rights of another. Mineral rights and water rights are closely linked, and often interrelated concepts.