3.54. throw
| Element type | throw |
| Attributes | event (2.0) | eventexpr (2.0) | message (2.0) | messageexpr (2.0) |
| Parents | block | catch | error | filled | help | if | noinput | nomatch |
| Children | None. |
| Description | Throws an event, either predefined or application-specific. |
DTD
<!ELEMENT throw EMPTY > <!ATTLIST throw event %event.name; #IMPLIED eventexpr %expression; #IMPLIED message CDATA #IMPLIED messageexpr %expression; #IMPLIED >
Language model
Attributes
event : event.name
The name of the event to throw.
eventexpr : expression
An expression that yields the name of the event to throw.
message : string
A string that is a part of the event being thrown.
messageexpr : expression
An expression that yields the message.
Children
None.
Examples
Example 3-65. Throwing user-defined events
<?xml version="1.0" encoding="iso-8859-1"?>
<vxml version="1.0">
<form id="showevent">
<field name="response">
<grammar>good | bad</grammar>
<prompt>How are things?</prompt>
<filled>
<if cond="response=='bad'">
<throw event="bad"/>
<else/>
<throw event="good"/>
</if>
</filled>
</field>
</form>
<catch event="good">
<prompt>Glad to hear they are good.</prompt>
<exit/>
</catch>
<catch event="bad">
<prompt>Sorry to hear things are bad.</prompt>
<throw event="better"/>
</catch>
<catch event="better">
<prompt>Hopefully they will get better.</prompt>
<exit/>
</catch>
</vxml>
|
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