During the import mapping process, you can specify a Computed column type. This computed column type has a set of functions available to it as part of Data Validator.
An example of how to add to the list of functions and implement some specific logic is provided in the Intergraph.VTL.Server.ImportMappingFunctoids custom assembly, which is located at Smart Community. For more information, see Find sample data on Smart Community.
The following example shows the computed column function available in the custom sample.