Type of Security Definition Request <c>.
0 = Request Security identity and specifications
1 = Request Security identity for the specifications provided (name of the security is not supplied)
2 = Request List Security Types ( Deprecated in FIX 5.0 SP1 )
3 = Request List Securities (can be qualified with Symbol, SecurityType, TradingSessionID, SecurityExchange. If provided then only list Securities for the specific type.) ( Deprecated in FIX 5.0 SP1 )
4 = Symbol <55>
6 = Product <460>
8 = All Securities