When importing a file there are often times when it would be useful to set a property within the target object that is not within the file, such as a source field. Where data such as customer or address records may have multiple sources it is important to signify the source of the data at the point of import. At present the only option would be to modify the data prior to import however that is not always simple or viable.
If you are referring to importing data files using “Import file types”, you can use the “Event triggered by match” and “Event triggered by create” settings (in the “Basics” tab) to trigger a rule to set a “Source” field.
Thanks Paul, I hadn’t considered that, valuable advice, cheers.