In the mapping spreadsheet, you will find a tab for each of the old tables in the legacy collection. Each table shows all of the old legacy columns, and their corresponding location in the new collection.  Please note that this is still a work-in-progress; wherever you see a row highlighted in light green, it's new location and/or new format is still being developed. Rows highlighted in light yellow indicate they are in the old but not the new, or, in many cases, they are new fields in the new collection that were not available in the old.