The functional specification document for the Common Works Registration defines the reason for creating CWR:
"The purpose of the Common Works Registration (CWR) format is to provide publishers and societies with a standard format for the registration of works.”
DDEX's Musical Works Notification Message Suite Standard (MWN) was designed to support a different set of use-cases to CWR, and in particular was designed to provide support for the complexities of works licensing in territories which do not have “central” licensing infrastructures - such as the USA (and Canada).
DDEX’s understanding is that CWR does not presently provide support for:
- The Musical Work Licencing process
- The Letters of Direction process
- Communicating a UGC policy for a work (e.g. Track/Monetize/Block)
- Sending audio files that relate to a work (e.g. for audio finger-printing)
- Communicating Lyrics
- Communicating information for Print rights
- Communicating UseTypes (i.e. sub-categories of Mechanical/Performing/Synch Rights)
Additionally, DDEX’s MWN standard provides more a more rich conflict notification and resolution mechanism than is available in CWR.
Conversely, MWN presently has limited or no support for:
- Communicating work origin information
- Communicating cue information
- Communicating a work’s instrumentation
In certain scenarios it is possible to use MWN alongside CWR. For example, a publisher may wish to send work registrations/claims to a licensee via CWR, but may wish to receive notification of conflicts back in MWN.