EMA C++ RDM Usage Guide : 11 Symbol List Domain : 11.5 Specific Usage
 
11.5 Specific Usage
The payload is a Map. No SummaryData is provided. Each Refresh message includes up to 150 MapEntrys. DataDefinitions are not used to reduce bandwidth. The Map.TotalCountHint is not provided. The Map.KeyFieldId is currently not set.
Each MapEntry’s key is a Buffer that can be used as a request’s Name to make a request for an instrument. Each MapEntry’s value is a FieldList that contains the following information:
PROV_SYMB (3422): Original symbol provided by the exchange
PROD_PERM (1): Permission information
The OPRA Venue’s SymbolList, 0#OPRA is a hierarchical SymbolList of SymbolLists. Nested SymbolLists start with Z#. For details, refer to the LDF Direct OPRA Venue Guide.
 
Code Example 6:  
Code Example 7: Symbol List Refresh Message Sample XML Message Layout