DonorHub Lite defines many "data targets" which relate loosely to the actual data that DonorHub Lite stores a copy of. Data targets define many target fields that can be imported into. Some fields are required, some are optional. For each data target you choose to implement a source scanner for, you must define a query to run against a data source. This "source query" should return records that can be used to populate the data target. A field mapping must be defined to link the fields from the source query to the target fields.