The problem with decision trees is that they can be expensive to execute because it involves evaluating each non-leaf node and based upon its truth, to either progress deeper into the structure or examine an alternative. This requires many machine cycles. The solution was to develop a standard language to represent a decision tree and use the industry standard XML language as the universal exchange vehicle. Then implement a transformational compiler that maps the XML representation into a set of forward chaining inference rules.

The MAP Flight Software C DH system functions as the sole interface between the MAP spacecraft/instrument subsystems and the ground operations equipment. The C DH system provides a command decoding and distribution system, a telemetry/data handling system, and a data storage and playback system.