# ExtractParameterDescription

Defines the parameters in an extract.

## Properties

| Name           | Data Type                                                                                            | Description                                                                                                                                                                                                                                                                                                                                                                                           |
| -------------- | ---------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `DataType`     | [ExtractParameterDataType](/docs/marketing/marketing-cloud/guide/extractparameterdatatype.md) 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.                                                                                                                                                                                                                                                                                                                                                                       |

## Related Items

- [ExtractParameter](/docs/marketing/marketing-cloud/guide/extractparameter.md)
- [ExtractParameterDataType](/docs/marketing/marketing-cloud/guide/extractparameterdatatype.md)