Task #473
Updated by Aaron Marcuse-Kubitza over 12 years ago
* _alt only preserves one of several alternative fields, while _merge concatenates them
* Important: _alt is still needed in cases where multiple input fields can serve as the unique key for a table, but additional input fields are also mapped elsewhere as their primary destination
** e.g. occurrenceID being used as location.sourceaccessioncode when no locationID is available
* in addition to changing the mappings, the auto-_alts added by bin/map should be changed to _merges