| << Prev | - Up - | Next >> |
There is a memory that is used for storing global variable values, which are accessible from all states.
There is a memory that is used for storing global variable values, which are accessible from all states. One thing such variables do is providing a mechanism to have parametrized actions connected to edges instead of fully instantiated ones. This extends the possibility of things that can happen over one and the same transition from one state to the next. So that way, the memory allows defining less states explicitly, as the actual arguments are defined via global variables instead of states. For instance we will see that there is no need to add explicit states for every different target floor in order to produce correct confirmation sentences. The floor requested is looked up in the memory and is added to the standard confirmation utterance.
The memory is also used for various other purposes that we will soon come across. It is important for the time management. The request of the selection function to the speech recogniser must be assigned a point in time when a relevant utterance from the user is to be expected. Relevant here means, an utterance that matches one of the arguments that the selection function is expecting. And the memory also adds dialogue context by keeping track of already recognised targets, which floors the elevator has been on, and the current floor. The global memory is reset when the automaton reaches the starting state again at the end of a trip or when it has given up understanding the user.
| << Prev | - Up - | Next >> |