Creating parameter maps from existing query items

You can create a parameter map that is based on existing query items.

1. Right-click the Parameter Maps folder in the Project Explorer pane and select New Parameter Map Based on Query Items.

   A new parameter map is added in the Parameter Maps folder with the working name New Parameter Map.

2. Rename the map as required and double-click the map to open the editor.
3. Click the New Query item icon.
4. Click the query item to use as the key, and then click the query item to use as the value. Both query items must be from the same query subject.
5. Optional: In the properties pane, specify the Default Value property.
   The default value is used if the key that is used in an expression is not mapped. If no default is provided, an unmapped key could produce an error.