RightsExpress is a demonstration service for creating ISO Standard - MPEG REL (“Rights Expression Language”) Licenses using easy-to-use entry forms and for editing Licenses previously created using a compatible version of this service. It generates valid MPEG REL expressions based on your input and builds Licenses appropriate to commonly-used business use cases. ContentGuard provides this service to help you understand the MPEG REL syntax and semantics. Creating MPEG REL License Modifying MPEG REL License Validating MPEG REL License Tip: For the best user experience, please access RightsExpress with Microsoft Internet Explorer.       Other browsers may not render the content properly.