12. The method according to claim 1 , wherein at least one of a command grammar or data on at least a set of commands potentially available for processing used to build a command grammar is persistently stored, and the representation of corresponding commands currently available for processing is derived therefrom.
12. The method according to claim 1 , wherein at least one of a command grammar or data on at least a set of commands potentially available for processing used to build a command grammar is persistently stored, and the representation of corresponding commands currently available for processing is derived therefrom. 13. The method according to claim 12 , wherein the stored representation of at least one command grammar is defined dynamically.