EMA C++ RDM Usage Guide : 7 Market By Order Domain : 7.3 Data : 7.3.3 MapEntry Contents
 
7.3.3 MapEntry Contents
The MapEntry.Key is a Buffer, Ascii, or Rmtes that contains the Order ID. The MapEntry.KeyFieldId may be set to ORDER_ID, so the information does not have to be repeated in the MapEntry.Value.
The MapEntry.Value is a FieldList that typically contains the following information about the order:
Order Price and Side (BID, ASK, or ORDER_PRC and ORDER_SIDE)
Order Size (BIDSIZE, ASKSIZE, or ORDER_SIZE)
Price Qualifiers (PRC_QL_CD, PRC_QL2)
Market Maker Identifier (MKT_MKR_ID or MMID)
Quote Time (QUOTIM_MS)