TESIS DOCTORAL - Robotics Lab - Universidad Carlos III de Madrid

7.5. How the robot interacts with the objects 16113 $describing = [$GARBAGE] $insults_compliments;VXML dialogs are based on forms which are filled according to the data providedby a user and processed by a grammar. In the mentioned application, just one form isnecessary. This dialog is shown in Listing 7.5. Initially, the form is identified with thename insults_compliments (line 7) and several properties are defined: the timeoutproperty specifies the default interval of silence allowed while waiting for a user inputbefore a noinput event is thrown. In this case, it is set to 30 seconds (line 9). Then, thedefault language and grammar are set (lines 12 and 13 of Listing 7.5). The prompt tagcontrols the output of the dialog: it can be a synthesized sentence, the configuration of aproperty, emitting an event, etc.The field element specifies an input item to be gathered from the user. In this dialog,this field is linked with the adjective attribute defined in the insults_complimentsgrammar. Once adjective is filled by a user’s utterance, the action defined by the codein the filled element is executed (between lines 19 and 28). In this case, depending onthe value of the adjective attribute, the user has paid Maggie a compliment or he hasoffended it. In the first case, the COMPLIMENTED event is sent and a happy sentence issaid (lines 21-22). In the last case, the OFFENDED event is emitted and a sad sentence issaid (lines 24-25).In the case that the field is not filled (the user does not speak, or his speech does notfit the grammar), after 30 seconds, the noinput element is executed (lines 30-33): this isnotified by the IGNORED event and the robot says "you ignore me".Code listing 7.5: The VXML dialog used by the Interact action.1 2 7 8109 11 12 #setLanguage$en13 #setGrammar$insults_compliments.gram14 15