[
  {
    "rule_no": "RD-001",
    "role": "customer_key",
    "name_pattern": "customer_id|cust_no|member_id",
    "data_type": "string"
  },
  {
    "rule_no": "RD-002",
    "role": "event_time",
    "name_pattern": "ordered_at|created_at|issued_at|measured_at",
    "data_type": "timestamp"
  },
  {
    "rule_no": "RD-003",
    "role": "amount",
    "name_pattern": "amount|order_amount|invoice_amount",
    "data_type": "decimal"
  },
  {
    "rule_no": "RD-004",
    "role": "channel",
    "name_pattern": "channel|sales_channel",
    "data_type": "string"
  },
  {
    "rule_no": "RD-005",
    "role": "item_key",
    "name_pattern": "product_id|item_id|sku",
    "data_type": "string"
  },
  {
    "rule_no": "RD-006",
    "role": "free_text",
    "name_pattern": "body|content|description",
    "data_type": "string"
  },
  {
    "rule_no": "RD-007",
    "role": "device_key",
    "name_pattern": "device_id|equipment_id",
    "data_type": "string"
  },
  {
    "rule_no": "RD-008",
    "role": "metric",
    "name_pattern": "temperature|pressure|vibration",
    "data_type": "double"
  },
  {
    "rule_no": "RD-009",
    "role": "order_key",
    "name_pattern": "order_id|order_no",
    "data_type": "string"
  },
  {
    "rule_no": "RD-010",
    "role": "status",
    "name_pattern": "status|state",
    "data_type": "string"
  }
]