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A grouping of one or more DDEX Messages to be processed by the recipient together.


A well-defined collection of items such as rights in Musical Works, Right Shares and/or Releases.

Note that the XML tags use the spelling “catalog” instead of catalogue.

Contractually Mandatory

An entity in a DDEX Message that has the technical cardinality of 0-1 or 0-n but that is mandatory when a DDEX message is sent in a specific commercial context.

Contractually Mandatory fields may, however, be mandatory when a DDEX message is sent in a specific commercial context. In such circumstances, a message is deemed conformant only if and when it contains all the “contractually mandatory” fields as agreed by Message Sender and Message Recipient.

Exclusive Rights Owner or Licensee

A company that is either the exclusive owner of all rights for a specific territory of all Resources within a Release or the sole licensee from an exclusive Rights Owner for sound recording/Resource rights for a The term “exclusive” here refers to those sound recording/Resource rights for a specific territory or set of territories.


A company that plays both roles of Release Creator (e.g. in communications to downstream Release Distributors) and Release Distributor (e.g. in communications upstream Release Creators).

Message Choreography

A series of message calls and their responses which together communicate a more comprehensive level of meaning between the two business partners.


The concept of ensuring that a party cannot repudiate, or refute, the sending or receiving of a message.


A Release is an abstract entity representing a bundle of one or more Resources compiled by an Issuer. The Resources in Releases are normally primarily sound recordings or music audio-visual recordings, but this is not invariably the case. The Release is not itself the item of trade (or “Product”). Products have more extensive attributes than Releases; one Release may be disseminated in many different Products.

Release Creator

Release Creator is an organisation which is the owner of copyrights in sound and/or music audiovisual recordings and/or exclusive licensees of copyrights in sound and/or music audiovisual recordings.

Release Distributor

Release Distributor is an organisation, which is duly authorised by a Release Creator to offer Releases manifested in the form of Products to consumers. Release Distributors include Digital Service Providers (DSPs) and Mobile Service Providers (MSPs) as well as other organisations.

Release Family

A set of Releases that are closely related. A typical example of a Release Family is an album communicated as a Main Release plus all the Track Releases whose Resources together form the Album.


A digital fixation of an expression of an abstract Work (such as a sound recording, a video, an image, software or a passage of text). Resources are individual assets that make up a Release. Typical Resources are sound recordings, video clips and cover art images.

Ticket ID

A unique identifier that links several Web Service Calls/Responses together.

Web Service Call

The sending of an XML document to a port/address on a web server, using HTTP or HTTPS.

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