OptionaldeleteDelete pipeline-written rows the new result no longer contains (default true; needs sourceField and derivedSourceValue).
OptionalderivedThe sourceField value of pipeline-written rows, e.g. "Derived".
Child fields identifying a row within its parent, e.g. ["JobFunctionID"].
OptionalsourceField naming who wrote a row, e.g. "Source". A row whose value differs from derivedSourceValue is human-owned. Without it every row counts as pipeline-written.
How a child mapping's rows are reconciled with existing rows under the same parent (idempotent re-runs).