A source parameter is a parameter that is defined in a map or information object from which you are building another information object.
You cannot set a source parameter to a column reference, such as ORDERS.ORDERID, or an Actuate SQL expression.
When you set a source parameter to a local parameter, you can indicate that the local parameter inherits the values of its prompt properties from the source parameter. The available prompt properties are Conceal Value, Default Value, Display Control Type, Do Not Prompt, and Required. If you specify that the local parameter inherits its prompt property values from the source parameter, and prompt property values for the source parameter change, the changes are propagated to the local parameter. For example, if the display control type for the source parameter changes from text box to read-only drop-down list, the display control type for the local parameter also changes from text box to read-only drop-down list.
If you change a prompt property value for a local parameter, its prompt property values are no longer inherited from the source parameter. For example, if you change the display control type for the local parameter to editable drop-down list, and the display control type for the source parameter later changes to text box, the change is not propagated to the local parameter. To reinstate inheritance, choose Reset in Prompt editor. Choosing Reset returns all property values in the local parameter to inherited values, and the local parameter inherits any future changes to property values in the source parameter.
To set source parameters, use the Parameters page. To define a local parameter and set a source parameter to the local parameter in one step, drag the source parameter from Source parameter, and drop it in Parameter, as shown in Figure 3-48.
