Abstract: A method and system are provided including a mapper module; a display; a memory storing processor-executable steps; and a mapper processor coupled to the memory, and in communication with the mapper module and operative to execute the processor-executable process steps to cause the system to: receive a link to a first data source, wherein the first data source is an external data source; parse data stored at the first data source; generate a mapper table based on the parsed data, wherein the mapper table includes at least one external data field associated with the parsed data; determine at least one target data field in a second data source, wherein the target data field corresponds to at least one external data field; map the at least one determined target data field to the corresponding external data field in the mapper table; and access the mapper table with an application during execution of the application. Numerous other aspects are provided.