Setting a source parameter
A source parameter is a parameter that is defined in an information object from which you are building an information object query. If a query contains an information object with a parameter, Parameters has a Source parameter field.
You can set a source parameter to one of the following types of values:
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You cannot set a source parameter to a column reference, such as ORDERS.ORDERID, or an Actuate SQL expression.
To define a local parameter and set the value of the source parameter to the value of the local parameter in one step, drag the source parameter from Source parameter, and drop it in Parameter, as shown in Figure 2-40. To reset the value for a parameter to the default value, choose Reset values.
Figure 2-40  
When you set the value of a source parameter to the value of a local parameter, by dragging and dropping, 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 a local parameter is set to inherit its prompt property values from the source parameter, and prompt property values for the source parameter change, the changes propagate 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, it no longer inherits prompt property values from the source parameter. For example, if you change the display control type for a local parameter to editable drop-down list, and the display control type for its source parameter later changes to text box, the display control type for the local parameter remains editable drop-down list. To reinstate inheritance, choose Reset in Prompt editor for the local parameter. Choosing Reset returns all prompt property values for the local parameter to inherited values. A reset local parameter inherits future changes made to prompt property values in the source parameter.
To set the value of a source parameter, use Parameters.

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