EMA C++ RDM Usage Guide : 2 Domain Model Overview : 2.1 What is a Domain Message Model?
 
2.1 What is a Domain Message Model?
A Domain Message Model describes a specific arrangement of Open Message Model message and data constructs. A domain message model will define any specialized behaviors associated with the domain or any specific meaning or semantics associated with data contained in the message. Unless a domain model specifies otherwise, any implicit market logic associated with a message still applies (e.g. an Update message indicates that any previously-received data also contained in the Update message is being modified).