The <param> element specifies values that are passed into the <object> or in <subdialog>. When <param> is contained in a <subdialog> element, the values specified are used to initialize <var> declarations in the subdialog that is invoked. The initialization takes precedence over the expr attribute in <var>.
<param name="String" value="String" expr="ECMAScript_Expression" valuetype="data" | "ref" type="MIME_type"/>
| name | The name attribute is the name associated with the parameter. This attribute is required. |
| value | The value attribute is the string value of the parameter. This attribute is required and either value or expr is required. |
| expr | The expr attribute is an expression that yields the parameter value. This attribute is required and either value or expr is required. |
| valuetype | The valuetype attribute indicates the reference type of the value. This attribute is not used for <subdialog>. This attribute is optional and defaults to data. * data – the value is actual data. * ref – the value referenced by a URI. |
| type | The type attribute is the media type of the result provided by a URI if the valuetype is ref. This is only relevant for the uses of <param> in the <object> element. This attribute is optional. |
<object>, <subdialog>
None.
None.
None.
This represents a document that calls the subdialog:
<?xml version="1.0"?>
<vxml version="2.0" xmlns="http://www.w3.org/2001/vxml">
<form>
<subdialog name="result" src="subdialog.vxml">
<param name="birthday" expr="'2000-02-10'"/>
<param name="age" value="100"/>
<filled>
<submit next="process.vxml"/>
</filled>
</subdialog>
</form>
</vxml>
This represents a document containing the subdialog:
<?xml version="1.0"?>
<?xml version="1.0"?>
<vxml version="2.0" xmlns="http://www.w3.org/2001/vxml">
<form id="getdriverslicense">
<var name="birthday"/>
<var name="age"/>
<block>
<prompt>
Hello, your birthday is <value expr="birthday"/>
and you are <value expr="age"/> years old.
</prompt>
<return/>
</block>
</form>
</vxml>