VoiceXML Tag <rule> Version 2.0

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VoiceXML Tag
<rule>

Define grammar rule.

Parent Tags
<grammar>

Content Syntax
The value may be empty, or may contain one or more elements, where an element is either parsed text or one of the following tags.

<count> <example> <item> <one-of> <ruleref> <token>

Attributes

Name	Req/opt	Default	Valid values
id	Required		Text
scope	Optional	"private"	"private" "public"

Compatibility
VoiceXML 1.0 No, 2.0 Yes.

Description
The <rule> tag encloses a named rule in a grammar. The rule is assigned the name given in its id attribute.

A <ruleref> tag can be used to reference the rule name in the <ruleref>'s src attribute, this causes the rule to be inserted at that point in the grammar.

The <rule> tag defines a rule but does not insert it (like defining a subroutine), the <ruleref> tag inserts the rule (like calling a subroutine).