This RDD specifies the carriage of ARRI camera system metadata by mechanisms of the MXF Constrained Generic Container described in SMPTE ST 379-2. These metadata describe picture essence originally created by ARRI cameras that could be encoded as ARRIRAW, as Apple ProRes or as some other encoding of picture essence, created audio essence (if audio essence is present), and additional metadata supplied by the user of the ARRI camera system during production or an application processing essence or metadata during post-production. The description encompasses the semantics of the metadata, their KLV coding, and their carriage using per-partition and per-frame mechanisms.