This standard was developed by the member organisations of the Digital Data Exchange, LLC (DDEX) and provides a format for a response to a sales/usage report received by an owner/administrator of Musical Works (usually the "Licensor") which sets out the claim (“right share”) each owner/administrator is making in respect of the Musical Works identified in the sales/usage report and all the calculation details behind the individual and aggregate royalty claim being made by each owner/administrator in such detail that the original sender of the sales/usage report (usually the "Licensee") can be confident in accepting the associated invoice for payment.
This standard defines the principles of the Claim Detail Message Suite Standard. It is accompanied by a series of standards that define Profile-specific messages based on this standard.
Any organisation wishing to implement this (or any other DDEX Standard) is required to apply for an Implementation Licence. The terms of the licence and an application form can be found here and here.