{
  "schema": { "name": "expense.canonical", "version": "1.2.0" },
  "workflow_id": "WF-2026-0044",
  "employee_id": "EMP-12345",
  "trip": {
    "start_date": "2026-10-01",
    "end_date":   "2026-10-03",
    "destination": "Berlin",
    "purpose": "Kundentermin + Workshop",
    "countries_visited": [
      { "country": "DE", "city": "Berlin", "from_date": "2026-10-01", "to_date": "2026-10-03" }
    ]
  },
  "currency": "EUR",
  "total_amount": "484.50",
  "project_assignment": {
    "project_code": "P-42",
    "cost_center": "CC-100",
    "source_attestation_ref": "sha256:1111000000000000000000000000000000000000000000000000000000000001"
  },
  "expense_items": [
    {
      "type": "HOTEL",
      "amount": "328.50",
      "incurred_on": "2026-10-01",
      "description": "Hotel Berlin Mitte, 2 Nächte",
      "receipt_ref": "pii://receipts/WF-2026-0044/01HFXYZ.pdf",
      "receipt_content_hash":    "sha256:a1b2c3d4e5f6a1b2c3d4e5f6a1b2c3d4e5f6a1b2c3d4e5f6a1b2c3d4e5f6a1b2",
      "receipt_attestation_ref": "sha256:deadbeefcafefeeddeadbeefcafefeeddeadbeefcafefeeddeadbeefcafefeed"
    },
    {
      "type": "PER_DIEM_ARRIVAL",
      "amount": "14.00",
      "incurred_on": "2026-10-01",
      "computed_from": {
        "transform_attestation_ref": "sha256:2222000000000000000000000000000000000000000000000000000000000002",
        "rate_query_attestation_ref": "sha256:3333000000000000000000000000000000000000000000000000000000000003",
        "rate_id": "PDR-42"
      }
    },
    {
      "type": "PER_DIEM_FULL",
      "amount": "28.00",
      "incurred_on": "2026-10-02",
      "computed_from": {
        "transform_attestation_ref": "sha256:2222000000000000000000000000000000000000000000000000000000000002",
        "rate_query_attestation_ref": "sha256:3333000000000000000000000000000000000000000000000000000000000003",
        "rate_id": "PDR-42"
      }
    },
    {
      "type": "PER_DIEM_DEPARTURE",
      "amount": "14.00",
      "incurred_on": "2026-10-03",
      "computed_from": {
        "transform_attestation_ref": "sha256:2222000000000000000000000000000000000000000000000000000000000002",
        "rate_query_attestation_ref": "sha256:3333000000000000000000000000000000000000000000000000000000000003",
        "rate_id": "PDR-42"
      }
    },
    {
      "type": "TRANSPORT_RAIL",
      "amount": "100.00",
      "incurred_on": "2026-10-01",
      "description": "ICE Hin- und Rückfahrt",
      "receipt_ref": "pii://receipts/WF-2026-0044/01HFABC.pdf",
      "receipt_content_hash":    "sha256:b2c3d4e5f6a1b2c3d4e5f6a1b2c3d4e5f6a1b2c3d4e5f6a1b2c3d4e5f6a1b2c3",
      "receipt_attestation_ref": "sha256:cafefeeddeadbeefcafefeeddeadbeefcafefeeddeadbeefcafefeeddeadbeef"
    }
  ]
}