That's slick, thanks!
So to keep just isbn & goodreads, is this correct?
Search field: {template}
Template: {isbn:|isbn:|, }{identifiers:select(goodreads)|goodreads:|}
Search for: empty
Replace with: empty
Destination field: identifiers
Identifier type:*
Mode: Replace field
Split Result: Unchecked
Do I care about this possibly creating an extraneous trailing comma?
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