2. A system according to claim 1 , wherein said data processor adaptively, dynamically limits said expressible phrases to words within said lexical hierarchy associated with said subset and probabilistically matches said words to detected phonemes.
1. A computerized integrated order entry and voice recognition system enabling voice responsive user entry of orders, comprising: a voice recognition unit for detecting spoken words and converting detected spoken words to data representing commands; a data processor, coupled to said voice recognition unit, for processing said data representing commands provided by said voice recognition unit, to provide order related data and menu options for use by a user, by interpreting said data representing commands using an ordering application specific ontology and excluding use of other non-ordering application specific ontologies, and by, (a) constraining recognizable expressible phrases to a subset of said ordering application specific ontology in response to a current navigational position within said ordering application specific ontology and (b) constraining recognizable expressible phrases to phrases in a lexical hierarchy associated with said subset, in response to a current navigational position within said lexical hierarchy, said ordering application enabling initiating an order for medication to be administered to a particular patient; and a user interface processor, coupled to said data processor, for providing data representing a display image, said display image, including said order related data and menu options provided by said data processor and supporting a user in selecting an order for medication to be administered to a particular patient.