3.2.1 Abstract Data Model
This section describes a conceptual model of possible data organization that an implementation maintains to participate in this protocol. The described organization is provided to facilitate the explanation of how the protocol behaves. This document does not mandate that implementations adhere to this model as long as their external behavior is consistent with that described in this document.
Document class: A structured XML text block that adheres to the XML schema defined in section 2.2. It is returned by the server as part of a full XML response to the client command requests specified in section 3.1.5.