{
  "synthetic": true,
  "record_id": "Stable source row identifier; retained across all output files.",
  "item_code": "Whitespace trimmed and letters capitalized; no product codes inferred.",
  "location": "Whitespace trimmed and letters capitalized.",
  "quantity": "Nonnegative integer; thousands separators removed. Zero is valid.",
  "unit_cost_usd": "USD price to at most two decimals. Extra precision is excluded for clarification, not rounded.",
  "extended_cost_usd": "quantity multiplied by unit_cost_usd using decimal arithmetic.",
  "duplicates": "Exact normalized records only. Related source ID appears in the exceptions log."
}