[
  {
    "name": "amt",
    "label": "Amount",
    "description": "Transaction amount.",
    "unit": "USD"
  },
  {
    "name": "log_amt",
    "label": "Log amount",
    "description": "Natural log of (1 + transaction amount).",
    "unit": ""
  },
  {
    "name": "category",
    "label": "Merchant category",
    "description": "Merchant category of the purchase.",
    "unit": ""
  },
  {
    "name": "hour",
    "label": "Hour of day",
    "description": "Hour of the transaction (0-23).",
    "unit": ""
  },
  {
    "name": "day_of_week",
    "label": "Day of week",
    "description": "ISO day of week (1 = Monday, 7 = Sunday).",
    "unit": ""
  },
  {
    "name": "is_night",
    "label": "Night-time",
    "description": "1 if the transaction is between 22:00 and 05:59.",
    "unit": ""
  },
  {
    "name": "age_at_txn",
    "label": "Customer age",
    "description": "Cardholder's age in whole years.",
    "unit": "years"
  },
  {
    "name": "log_city_pop",
    "label": "Log city population",
    "description": "Natural log of (1 + population of the cardholder's city).",
    "unit": ""
  },
  {
    "name": "distance_km",
    "label": "Distance to merchant",
    "description": "Great-circle distance between the cardholder's home and the merchant.",
    "unit": "km"
  },
  {
    "name": "card_txn_count_1h",
    "label": "Card transactions, last hour",
    "description": "Number of earlier transactions on this card in the previous hour.",
    "unit": ""
  },
  {
    "name": "card_txn_count_24h",
    "label": "Card transactions, last 24h",
    "description": "Number of earlier transactions on this card in the previous 24 hours.",
    "unit": ""
  },
  {
    "name": "card_txn_count_7d",
    "label": "Card transactions, last 7 days",
    "description": "Number of earlier transactions on this card in the previous 7 days.",
    "unit": ""
  },
  {
    "name": "card_amt_sum_24h",
    "label": "Card spend, last 24h",
    "description": "Total amount spent on this card in the previous 24 hours.",
    "unit": "USD"
  },
  {
    "name": "card_avg_amt_prior",
    "label": "Card average amount",
    "description": "Average amount of all earlier transactions on this card (empty if none).",
    "unit": "USD"
  },
  {
    "name": "amt_to_card_avg_ratio",
    "label": "Amount vs card average",
    "description": "This amount divided by the card's earlier average amount (empty if no history).",
    "unit": "x"
  },
  {
    "name": "secs_since_last_txn",
    "label": "Time since last transaction",
    "description": "Seconds since the card's previous transaction (empty if none).",
    "unit": "s"
  },
  {
    "name": "is_new_category_for_card",
    "label": "New category for card",
    "description": "1 if this card has never been used in this merchant category before.",
    "unit": ""
  },
  {
    "name": "card_txn_number",
    "label": "Card history depth",
    "description": "Number of earlier transactions on this card (all time).",
    "unit": ""
  }
]