... acquire more over time: we in-tend for it to generalize and encapsulate best practices,and serve as a testbed for new practices. Dyna is now be-ing used for parsing, machine translation, morphologicalanalysis, ... probabilities, whichpermits heuristic early stopping before the agenda isempty. With viterbi values, it amounts to uniform-costsearch for the best parse, and an item’s value is guaran-teed ... Parameter TrainingDyna provides facilities for training parameters. For ex-ample, from Fig. 1, it automatically derives the inside-outside (EM) algorithm for training PCFGs.How is this possible?...