Abstract: A universal mapping system, including apparatuses and methods, which is configurable through use of selectable configuration files to perform the bi-directional mapping and conversion of data between different data structures and formats. Each configuration file uniquely corresponds to a particular type of device which stores mappable data in a structure and/or format different than those of other types of devices. The universal mapping system is operable to perform mappings of data according to priority rules which are definable in the configuration files and which govern the order in which the mappings of data elements are performed. The universal mapping system is also adapted to maintain associations between data elements resulting from prior mappings. Additionally, the universal mapping system is operable to persist unmappable data from a source during a mapping in one direction and to return the unmappable data to that source during a subsequent mapping in the opposite direction.