The Aggregate Data Exchange (ADX) profile defines the structure of ADX/XML messages to be exchanged between a Content Creator and a Content Consumer.  . ADX introduces a new actor: the Content Data Structure Creator.  The Content Data Structure Creator defines the structural metadata (eg code lists for dataelements) to be used in the message exchange.  The message structure definition files created by the Content Data Structure Creator may be employed by a Content Creator to construct and exchange interoperable, ADX-conformant messages with a Content Consumer. 