EMA C++ RDM Usage Guide : 8 Market By Price Domain : 8.6 Specific Usage: RDMS
 
8.6 Specific Usage: RDMS
For the most part, MarketByPrice data from LSEG Real-Time Distribution System is the same as it is from the original source of the data (e.g. LDF Direct). However, if caching is enabled in an LSEG Real-Time Distribution System component, there are two differences.
The number of messages packed into each Refresh response message may be different.
Updated response messages may be delivered between Refresh response messages, before the RespMsg.Complete is set to true. It is the consumer applications responsibility to apply the indicated changes.
 
Code Example 6: Market By Price Request Message Sample XML Message Layout
Code Example 7: Market By Price Refresh Message Sample XML Message Layout