In Relativity, what is the difference between 'Append' and 'Append/Overlay' import modes in the RDC?
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A
Append adds only new records; Append/Overlay adds new records and updates existing ones matched by the identifier
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B
Append imports all records including duplicates; Append/Overlay skips duplicates automatically
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C
Append creates new documents with auto-assigned numbers; Append/Overlay uses numbers from the load file
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D
There is no difference — both modes produce the same result for most imports