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from the Plum Voice IVR Glossary
In a VXML application, a nomatch indicates a user input element that is not recognized as part of the active grammar. The <nomatch> element contains two distinctive attributes: the count and the condition. The count allows the developer to handle different occurrences of the same event differently. Each form menu and form item maintains a counter for each event that occurs while it is being visited; these counters are reset each time the <menu> or form item’s <form> is re-entered. The form-level counters are used in the selection of an event handler for events thrown in a form-level <filled>. A condition attribute is an expression that must evaluate to true after conversion to Boolean in order for the event to be caught.
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