Function mappings link a CEG field to a value using a function to retrieve or define the refined event information that appears in the refined event. All function mappings consist of a CEG field name, a predefined or class field value, and the function.
For example, a function mapping can concatenate a series of native event values to a single CEG field using the concat function.
If there are duplicate function mappings, the DM file uses the last one it finds. You could set a duplicate mapping to call a second function if the first was not found or did not function as expected.
To set function mappings
The Function Mappings screen appears, displaying current or default mappings. The Name column shows a CEG or parsed field, the Function column the current linking function, and the Value column a text or field value.
Note: Select a parsing file in the Provide File Details step for parsed field values to appear.
The mapping entry appears in the Mapping Details pane.
Note: The concatenate (concat) function works differently than the others, because you specify multiple target values. For more information, see Set a Concat Function Mapping.
The value appears in the Selected Fields area.
Note: Adding multiple values decreases performance of the mapping, so use stand-alone function mappings only if necessary.
If you click Save and Close, the new file appears in the Mapping File User folder, otherwise the step you select appears.
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