required Attribute
Applies To: Windows Server 2008
The required attribute specifies a Boolean value that represents whether a value must be specified for the parameter.
Syntax
required="true|false"
where the required attribute is specified as true or false. This is an optional attribute. The required attribute default value is false.
Examples
This XML fragment identifies an enum element representing a drop-down list where a value must be selected when the policy setting is enabled.
<enum id="Sample_Dropdownlist_Box" valueName="Example2DropDownList" required="true">