I'm needing to create a Workflow type for Umbraco-Forms, and one of the requirements is that the admin can create the mapping to be used, so the workflow knows what form-fields should be mapped to what target-fields for processing. Ideally they'd be able to specify a variable list of mapping pairs on the workflow config, but I guess that could store the list of known target-fields and ask them for the form-field mapping. The UI and storage of the mapping properties for this is hurting my head... any suggestions?