Although open content licenses only account for a fraction of all copyright licenses currently enforced in the world, their introduction has had profound effects on the use and dissemination of information. This book explores the theoretical underpinnings of these licenses and offers insight on the practical advantages and inconveniences of their use. The essays collected here include an objective study of the principles of open content from the perspective of European intellectual property law as well as novel examinations of their possible implementation in different areas of the cultural or information industry.