19. The non-transitory computer-readable storage medium of claim 15 , wherein the plurality of selection identifiers from user speech represents an N-best hypothesis as a result of output from a speech recognition module.
19. The non-transitory computer-readable storage medium of claim 15 , wherein the plurality of selection identifiers from user speech represents an N-best hypothesis as a result of output from a speech recognition module. 20. The non-transitory computer-readable storage medium of claim 19 , wherein the N-best hypothesis is compared to the set of reference identifiers to identify matches for use in deriving the dynamic grammar.