13. A computer program product in a non-transitory computer readable storage medium for transforming an input sequence of unstructured speech recognition text into output structured document text, the product comprising: program code for performing transformation modeling of a source unstructured speech recognition text to create a most likely word sequence output structured document text, the program code for performing transformation modeling including: program code for providing a probabilistic word substitution model to establish association probabilities indicative of target structured document text correlating with source unstructured speech recognition text; program code for considering a set of candidate sequences of structured document text based on the word substitution model with respect to an input sequence of unstructured speech recognition text; program code for evaluating the likelihood of candidates corresponding to the input sequence of unstructured speech recognition text; program code for determining as an output a most likely sequence of structured document text.
13. A computer program product in a non-transitory computer readable storage medium for transforming an input sequence of unstructured speech recognition text into output structured document text, the product comprising: program code for performing transformation modeling of a source unstructured speech recognition text to create a most likely word sequence output structured document text, the program code for performing transformation modeling including: program code for providing a probabilistic word substitution model to establish association probabilities indicative of target structured document text correlating with source unstructured speech recognition text; program code for considering a set of candidate sequences of structured document text based on the word substitution model with respect to an input sequence of unstructured speech recognition text; program code for evaluating the likelihood of candidates corresponding to the input sequence of unstructured speech recognition text; program code for determining as an output a most likely sequence of structured document text. 19. A computer program product according to claim 13 , where the probabilistic word substitution model is derived based on a set of archived dictations and corresponding text documents.