{
  "title": "Sage Contact Structure",
  "description": "JSON structure documentation for Sage Accounting contact data model",
  "type": "object",
  "structure": {
    "id": {"type": "string", "description": "Unique Sage contact identifier"},
    "displayed_as": {"type": "string", "description": "Display name"},
    "name": {"type": "string", "description": "Full name or company name"},
    "reference": {"type": "string", "description": "Internal reference code"},
    "contact_types": {
      "type": "array",
      "description": "Contact roles (CUSTOMER and/or SUPPLIER)",
      "items": {
        "id": {"type": "string", "enum": ["CUSTOMER", "SUPPLIER"]},
        "displayed_as": {"type": "string"}
      }
    },
    "email": {"type": "string", "format": "email"},
    "telephone": {"type": "string"},
    "address": {
      "type": "object",
      "description": "Postal address",
      "children": {
        "address_line_1": {"type": "string"},
        "address_line_2": {"type": "string"},
        "city": {"type": "string"},
        "region": {"type": "string"},
        "postal_code": {"type": "string"},
        "country": {"type": "object", "description": "Country reference with id and display name"}
      }
    },
    "balance": {"type": "number", "description": "Current account balance"},
    "outstanding_balance": {"type": "number", "description": "Unpaid balance"},
    "created_at": {"type": "string", "format": "date-time"},
    "updated_at": {"type": "string", "format": "date-time"}
  }
}