Question

是否允许嵌套'if'语句？例如：

<if cond="1 == 1">
  <if cond="2 == 2">
      One is in fact equal to one and Two is in fact equal to two
  <else/>
      One is in fact equal to one but Two is never not equal to two
  </if>
<else/>
  One is never not equal to one
</if>

我意识到我可以使用'&&'语句重写这个条件，但是我想要做的逻辑会变得混乱，以便继续重复if elseifs链条。

Answer 1

是的，根据找到的架构定义here。 if是executable.content元素，允许包含零个或多个executable.content元素的序列。

Answer 2

添加@ John的答案（因为评论有字数限制）：

对于VXML 2.1也是如此：https://www.w3.org/TR/voicexml21/vxml.xsd

<xsd:element name="if">
<xsd:sequence>
<xsd:group ref="executable.content" minOccurs="0" maxOccurs="unbounded"/>
<xsd:sequence minOccurs="0" maxOccurs="unbounded">
<xsd:element ref="elseif"/>
<xsd:group ref="executable.content" minOccurs="0" maxOccurs="unbounded"/>
</xsd:sequence>
<xsd:sequence minOccurs="0" maxOccurs="1">
<xsd:element ref="else"/>
<xsd:group ref="executable.content" minOccurs="0" maxOccurs="unbounded"/>
</xsd:sequence>
</xsd:sequence>
<xsd:attributeGroup ref="If.attribs"/>
</xsd:complexType>
</xsd:element>

vxml中是否允许嵌套'if'语句？

2 个答案: