List of rights expression languages (RELs).

MPEG-21 REL MPEG-21 Rights Expression Language as defined in ISO/IEC 21000-5. MPEG-21 REL Base Profile MPEG-21 Rights Expression Language Base Profile as defined in ISO/IEC 21000-5. MPEG-21 REL DAC Profile MPEG-21 Rights Expression Language Dissemination and Capture Profile as defined in ISO/IEC 21000-5.