Show pageOld revisionsBacklinksExport to PDFBack to top This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong. ===== Event handling ===== **Types of events** An event is thrown by the VoiceXML platform for any number of reasons, such as a user not responding to an input, not responding correctly, requesting help, etc. An event is also thrown if there is a semantic error in the VoiceXML document, or when the <throw> element is encountered. The <throw> element generates an event (user-defined or system) and the <catch> element catches the event thrown by the VoiceXML document, dialog, or form item. **Throw element** The <throw> element generates predefined or user-defined events. An example of the use of the <throw> element is: <code> <throw event="nomatch"/> </code> In this case, an event is generated when an input by the user is not recognized as part of the active grammar. The attribute for the <throw> element is event, which defines the event to be thrown. **Catch element** The <catch> element catches the event thrown by the VoiceXML document, dialog, or form item. An example of the use of the <catch> element is: <code> <catch event="nomatch"/> <throw event="event.password.invalid"/> </catch> </code> The following is a set of catch elements available: * <error>: catches events of type error * <help>: catches events if no help is available * <noinput>: catches events if there was no input by the user * <nomatch>: catches events if an input by the user is not recognized as part of the active grammar legacy/vxi_tutorial/events.txt Last modified: 2017/07/28 23:53by javier