Returns the String value for the provided ITuple. Applies to string valued data, and element valued data of which the range is not a subset of Integers. 

virtual const char* getString(const ITuple* tuple) = 0;

Returns the String value for the provided Tuple. Applies to string valued data, and element valued data of which the range is not a subset of Integers. 

virtual const char* getString(const Tuple& tuple) = 0;

IDataView Class