You can use existing query items to create a parameter map.
Procedure
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Click the Parameter Maps folder,
and click Actions, Create, Parameter
Map.
-
In the Name box, type a name for
the new parameter map.
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Click Base the parameter map on existing Query
Items, Next.
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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.
-
Click Next.
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In the Default Value box, type a
value.
If the key used in an expression is not mapped, the default value
is used.
Setting a default value is optional. However, if no default is
provided, an unmapped key could produce an error.
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Click Finish.