ExtractParameterDescription

Defines the parameters in an extract.

Name	Data Type	Description
`DataType`	ExtractParameterDataType object	This has been deprecated. Use ValueType. (PropertyDefinition) The data type of the parameter to pass to the Data Extract. Use the data type to dynamically build a user interface with some basic data validation. (ExtractParameterDescription).
`DefaultValue`	String	The default value for a data extension field if no value is supplied. Include `Now()` as the default value to have the field default to today’s date. Used by `ExtractParameterDescription` as the default value for the parameter if not supplied when a data extract is executed. Used by `PropertyDefinition` if the default value for the attribute if not supplied for a data profile attribute.
`DropDownList`	String	Specifies the multiple potential values for a dropdown list in an extract parameter.
`IsOptional`	Boolean	Indicates whether a parameter is optional.
`Name`	String	Name of the object or property.