Rights of use are part of the German Copyright Act (§ 31ff. UrhG). An originator may grant another party the right to use a work only in a certain way or in any possible way. Types of use include any clearly definable forms of use, e.g., of a printed book or e-book. A right of use may be granted as a simple or exclusive right and may be limited in terms of space, time, or content (see also Licenses).

Source: UrhG, Wikipedia, edited (only available in German)