[Attribute] DefaultValue [Required] No [Description] Specifies a default value to use for the parameter if the user does not specify a value when the user runs the test. This attribute is required when the Parameters element that is the parent of this Parameter element is a child of the DiagnosticTest element. You cannot specify a value for this attribute when the Parameters element that is the parent of this Parameter element is a child of the PreStep, RunStep, or PostStep element. The maximum length of the default value is 255 characters. [Type] 
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