Custom Props

Key Custom Props in Blotter refers to an optional 1D-array of titles in the given table Trades that do not interfere with the creation of the objects of type Tradable that correspond to the rows of that table.
In effect, these titles define some of the properties in the raw data as constituting part of the trades, even though they are needed in the definition of the corresponding financial structures.
In this sense, these titles represent "custom properties", since their number and naming can be arbitrarily set by the user.