Towards the Interoperability between MPEG-21 REL and Creative Commons Licenses

Digital rights management systems enable the distribution and use of multimedia content in a controlled way through the complete digital value chain. The terms and conditions of use, delivery and access to multimedia content are specified using a Rights Expression Language. A REL is a formal language designed to define the permissions and constraints of use of multimedia content. Creative Commons has defined different types of licenses to govern digital works when publishing them. Nevertheless, these licenses do not use a specific REL. A key issue is to express CC licenses using a REL. Then, DRM systems can control the use of the governed digital works. This paper presents two approaches to express CC licenses using the MPEG-21 REL