EMA C++ RDM Usage Guide : 7 Market By Order Domain : 7.1 Description
 
7.1 Description
The Market By Order domain provides access to Level II full order books. The list of orders is sent in the form of a Map. Each MapEntry represents one order (using the order’s Id as its key) and contains a FieldList describing information related to that order (such as price, whether it is a bid/ask order, size, quote time, and market maker identifier).
 
NOTE: GenericMsg(s) are not supported for MMT_MARKET_BY_ORDER Domain Models.