5. A system according to claim 1 , wherein said ordering application specific ontology comprises an ordering application specific vocabulary.
5. A system according to claim 1 , wherein said ordering application specific ontology comprises an ordering application specific vocabulary. 11. A system according to claim 5 , wherein said ordering application specific vocabulary comprises codes, terms and identifiers associated with particular medications and sets of medications and with laboratory tests, radiology tests, nursing services and observations, dietary and nutrition services, fluids, drains, dressings, procedures, treatments, infection control, physical and occupational therapy services, admission, discharge and transfer.