{
  "rules": [
    {
      "field": "currency",
      "mode": "exact"
    },
    {
      "field": "total",
      "mode": "decimal",
      "absolute_tolerance": "0.01"
    },
    {
      "field": "supplier",
      "mode": "text",
      "trim": true,
      "collapse_whitespace": true
    },
    {
      "field": "purchase_order",
      "mode": "exact"
    }
  ],
  "cases": [
    {
      "id": "invoice-01",
      "group": "Invoices",
      "values": {
        "currency": "USD",
        "total": "120.00",
        "supplier": "Example Supply",
        "purchase_order": null
      }
    },
    {
      "id": "invoice-02",
      "group": "Invoices",
      "values": {
        "currency": "USD",
        "total": "80.00",
        "supplier": "Example Supply",
        "purchase_order": "PO-02"
      }
    },
    {
      "id": "order-01",
      "group": "Orders",
      "values": {
        "currency": "USD",
        "total": "50.00",
        "supplier": "Example Parts",
        "purchase_order": "PO-03"
      }
    },
    {
      "id": "order-02",
      "group": "Orders",
      "values": {
        "currency": "USD",
        "total": "10.00",
        "supplier": "Example Parts",
        "purchase_order": null
      }
    }
  ]
}