54 "The export is flat — one row per SKU. Configurable products and their simple children are separate rows tied together by the configurable_variations column, not by row grouping.",
55 "configurable_variations packs the parent→variant links as 'sku=X,size=M|sku=Y,size=L'. v1 records this column rather than parsing it; the mapper decides how variants are reconstructed.",
56 "additional_attributes packs arbitrary key=value pairs into one cell.",
57 "categories paths are '/'-separated and usually start with the store root ('Default Category/...'), which normally should not become a Wix category.",
58 "Exports are commonly quote-all, so an empty cell is a quoted empty string rather than an absent value — the detected emptyPolicy handles this."