8. A method as claimed in claim 1 comprising using the at least one example and the one or more probability distributions to obtain complete examples of ordered sequences of items compatible with the probabilistic process.
8. A method as claimed in claim 1 comprising using the at least one example and the one or more probability distributions to obtain complete examples of ordered sequences of items compatible with the probabilistic process. 9. A method as claimed in claim 8 comprising updating the one or more probability distributions by carrying out inference using the complete examples.