The modular operator concept of RapidMiner (formerly YALE) allows the
design of complex nested operator chains for a huge number of learning
problems in a very fast and efficient way (rapid prototyping).
The data handling is transparent to the operators.
They do not have to cope with the actual data format or different data
views - the RapidMiner core takes care of all necessary transformations.
Read here about the most important features of RapidMiner.