A publishing contract is a legal contract between a publisher and a writer or author (or more than one), to publish original content by the writer(s) or author(s). This may involve a single written work, or a series of works.
In the case of music publishing, the emphasis is not on printed or recorded works. It usually refers to the promotion of a musical composition, and/or its referral to a suitable recording artist. A music publisher who does produce (or contract to issue) sheet music is known as a music print publisher. It can be used by authors, journalist .etc