{
  "1": {
    "type": "b",
    "length": "64",
    "description": "Bit map (b 128 if secondary is present and b 192 if tertiary is present)"
  },
  "2": {
    "type": "n",
    "length": "..19",
    "description": "Primary account number (PAN)"
  },
  "3": {
    "type": "n",
    "length": "6",
    "description": "Processing code"
  },
  "4": {
    "type": "n",
    "length": "12",
    "description": "Amount, transaction"
  },
  "5": {
    "type": "n",
    "length": "12",
    "description": "Amount, settlement"
  },
  "6": {
    "type": "n",
    "length": "12",
    "description": "Amount, cardholder billing"
  },
  "7": {
    "type": "n",
    "length": "10",
    "description": "Transmission date & time"
  },
  "8": {
    "type": "n",
    "length": "8",
    "description": "Amount, cardholder billing fee"
  },
  "9": {
    "type": "n",
    "length": "8",
    "description": "Conversion rate, settlement"
  },
  "10": {
    "type": "n",
    "length": "8",
    "description": "Conversion rate, cardholder billing"
  },
  "11": {
    "type": "n",
    "length": "6",
    "description": "System trace audit number (STAN)"
  },
  "12": {
    "type": "n",
    "length": "6",
    "description": "Time, local transaction (hhmmss)"
  },
  "13": {
    "type": "n",
    "length": "4",
    "description": "Date, local transaction (MMDD)"
  },
  "14": {
    "type": "n",
    "length": "4",
    "description": "Date, expiration"
  },
  "15": {
    "type": "n",
    "length": "4",
    "description": "Date, settlement"
  },
  "16": {
    "type": "n",
    "length": "4",
    "description": "Date, conversion"
  },
  "17": {
    "type": "n",
    "length": "4",
    "description": "Date, capture"
  },
  "18": {
    "type": "n",
    "length": "4",
    "description": "Merchant type"
  },
  "19": {
    "type": "n",
    "length": "3",
    "description": "Acquiring institution country code"
  },
  "20": {
    "type": "n",
    "length": "3",
    "description": "PAN extended, country code"
  },
  "21": {
    "type": "n",
    "length": "3",
    "description": "Forwarding institution. country code"
  },
  "22": {
    "type": "an",
    "length": "12",
    "description": "Point of service entry mode"
  },
  "23": {
    "type": "n",
    "length": "3",
    "description": "Application PAN sequence number"
  },
  "24": {
    "type": "n",
    "length": "3",
    "description": "Function code (ISO 8583:1993)\/Network International identifier (NII)"
  },
  "25": {
    "type": "n",
    "length": "2",
    "description": "Point of service condition code"
  },
  "26": {
    "type": "n",
    "length": "2",
    "description": "Point of service capture code"
  },
  "27": {
    "type": "n",
    "length": "1",
    "description": "Authorizing identification response length"
  },
  "32": {
    "type": "n",
    "length": "..11",
    "description": "Acquiring institution identification code"
  },
  "33": {
    "type": "n",
    "length": "..11",
    "description": "Forwarding institution identification code"
  },
  "34": {
    "type": "ns",
    "length": "..28",
    "description": "Primary account number, extended"
  },
  "35": {
    "type": "z",
    "length": "..37",
    "description": "Track 2 data"
  },
  "36": {
    "type": "n",
    "length": "...104",
    "description": "Track 3 data"
  },
  "37": {
    "type": "an",
    "length": "12",
    "description": "Retrieval reference number"
  },
  "38": {
    "type": "an",
    "length": "6",
    "description": "Authorization identification response"
  },
  "39": {
    "type": "an",
    "length": "2",
    "description": "Response code"
  },
  "40": {
    "type": "an",
    "length": "3",
    "description": "Service restriction code"
  },
  "41": {
    "type": "ans",
    "length": "8",
    "description": "Card acceptor terminal identification"
  },
  "42": {
    "type": "ans",
    "length": "15",
    "description": "Card acceptor identification code"
  },
  "43": {
    "type": "ans",
    "length": "40",
    "description": "Card acceptor name\/location (1-23 address 24-36 city 37-38 state 39-40 country)"
  },
  "44": {
    "type": "an",
    "length": "..25",
    "description": "Additional response data"
  },
  "45": {
    "type": "an",
    "length": "..76",
    "description": "Track 1 data"
  },
  "46": {
    "type": "an",
    "length": "...999",
    "description": "Additional data - ISO"
  },
  "47": {
    "type": "an",
    "length": "...999",
    "description": "Additional data - national"
  },
  "48": {
    "type": "an",
    "length": "...999",
    "description": "Additional data - private"
  },
  "49": {
    "type": "a",
    "length": "3",
    "description": "Currency code, transaction"
  },
  "50": {
    "type": "a",
    "length": "3",
    "description": "Currency code, settlement"
  },
  "51": {
    "type": "a",
    "length": "3",
    "description": "Currency code, cardholder billing"
  },
  "52": {
    "type": "b",
    "length": "64",
    "description": "Personal identification number data"
  },
  "53": {
    "type": "n",
    "length": "16",
    "description": "Security related control information"
  },
  "54": {
    "type": "an",
    "length": "...120",
    "description": "Additional amounts"
  },
  "55": {
    "type": "ans",
    "length": "...999",
    "description": "Reserved ISO"
  },
  "56": {
    "type": "ans",
    "length": "...999",
    "description": "Reserved ISO"
  },
  "57": {
    "type": "ans",
    "length": "...999",
    "description": "Reserved national"
  },
  "58": {
    "type": "ans",
    "length": "...999",
    "description": "Reserved national"
  },
  "59": {
    "type": "ans",
    "length": "...999",
    "description": "Reserved national"
  },
  "60": {
    "type": "ans",
    "length": "...999",
    "description": "Reserved national"
  },
  "61": {
    "type": "ans",
    "length": "...999",
    "description": "Reserved private"
  },
  "62": {
    "type": "ans",
    "length": "...999",
    "description": "Reserved private"
  },
  "63": {
    "type": "ans",
    "length": "...999",
    "description": "Reserved private"
  },
  "64": {
    "type": "b",
    "length": "16",
    "description": "Message authentication code (MAC)"
  },
  "65": {
    "type": "b",
    "length": "1",
    "description": "Bitmap, extended"
  },
  "66": {
    "type": "n",
    "length": "1",
    "description": "Settlement code"
  },
  "67": {
    "type": "n",
    "length": "2",
    "description": "Extended payment code"
  },
  "68": {
    "type": "n",
    "length": "3",
    "description": "Receiving institution country code"
  },
  "69": {
    "type": "n",
    "length": "3",
    "description": "Settlement institution country code"
  },
  "70": {
    "type": "n",
    "length": "3",
    "description": "Network management information code"
  },
  "71": {
    "type": "n",
    "length": "4",
    "description": "Message number"
  },
  "72": {
    "type": "n",
    "length": "4",
    "description": "Message number, last"
  },
  "73": {
    "type": "n",
    "length": "6",
    "description": "Date, action (YYMMDD)"
  },
  "74": {
    "type": "n",
    "length": "10",
    "description": "Credits, number"
  },
  "75": {
    "type": "n",
    "length": "10",
    "description": "Credits, reversal number"
  },
  "76": {
    "type": "n",
    "length": "10",
    "description": "Debits, number"
  },
  "77": {
    "type": "n",
    "length": "10",
    "description": "Debits, reversal number"
  },
  "78": {
    "type": "n",
    "length": "10",
    "description": "Transfer number"
  },
  "79": {
    "type": "n",
    "length": "10",
    "description": "Transfer, reversal number"
  },
  "80": {
    "type": "n",
    "length": "10",
    "description": "Inquiries number"
  },
  "81": {
    "type": "n",
    "length": "10",
    "description": "Authorizations, number"
  },
  "82": {
    "type": "n",
    "length": "12",
    "description": "Credits, processing fee amount"
  },
  "83": {
    "type": "n",
    "length": "12",
    "description": "Credits, transaction fee amount"
  },
  "84": {
    "type": "n",
    "length": "12",
    "description": "Debits, processing fee amount"
  },
  "85": {
    "type": "n",
    "length": "12",
    "description": "Debits, transaction fee amount"
  },
  "86": {
    "type": "n",
    "length": "16",
    "description": "Credits, amount"
  },
  "87": {
    "type": "n",
    "length": "16",
    "description": "Credits, reversal amount"
  },
  "88": {
    "type": "n",
    "length": "16",
    "description": "Debits, amount"
  },
  "89": {
    "type": "n",
    "length": "16",
    "description": "Debits, reversal amount"
  },
  "90": {
    "type": "n",
    "length": "42",
    "description": "Original data elements"
  },
  "91": {
    "type": "an",
    "length": "1",
    "description": "File update code"
  },
  "92": {
    "type": "an",
    "length": "2",
    "description": "File security code"
  },
  "93": {
    "type": "an",
    "length": "5",
    "description": "Response indicator"
  },
  "94": {
    "type": "an",
    "length": "7",
    "description": "Service indicator"
  },
  "95": {
    "type": "an",
    "length": "42",
    "description": "Replacement amounts"
  },
  "96": {
    "type": "b",
    "length": "64",
    "description": "Message security code"
  },
  "98": {
    "type": "ans",
    "length": "25",
    "description": "Payee"
  },
  "99": {
    "type": "n",
    "length": "..11",
    "description": "Settlement institution identification code"
  },
  "100": {
    "type": "n",
    "length": "..11",
    "description": "Receiving institution identification code"
  },
  "101": {
    "type": "ans",
    "length": "..17",
    "description": "File name"
  },
  "102": {
    "type": "ans",
    "length": "..28",
    "description": "Account identification 1"
  },
  "103": {
    "type": "ans",
    "length": "..28",
    "description": "Account identification 2"
  },
  "104": {
    "type": "ans",
    "length": "...100",
    "description": "Transaction description"
  },
  "105": {
    "type": "ans",
    "length": "...999",
    "description": "Reserved for ISO use"
  },
  "106": {
    "type": "ans",
    "length": "...999",
    "description": "Reserved for ISO use"
  },
  "107": {
    "type": "ans",
    "length": "...999",
    "description": "Reserved for ISO use"
  },
  "108": {
    "type": "ans",
    "length": "...999",
    "description": "Reserved for ISO use"
  },
  "109": {
    "type": "ans",
    "length": "...999",
    "description": "Reserved for ISO use"
  },
  "110": {
    "type": "ans",
    "length": "...999",
    "description": "Reserved for ISO use"
  },
  "111": {
    "type": "ans",
    "length": "...999",
    "description": "Reserved for ISO use"
  },
  "112": {
    "type": "ans",
    "length": "...999",
    "description": "Reserved for national use"
  },
  "113": {
    "type": "ans",
    "length": "...999",
    "description": "Reserved for national use"
  },
  "114": {
    "type": "ans",
    "length": "...999",
    "description": "Reserved for national use"
  },
  "115": {
    "type": "ans",
    "length": "...999",
    "description": "Reserved for national use"
  },
  "116": {
    "type": "ans",
    "length": "...999",
    "description": "Reserved for national use"
  },
  "117": {
    "type": "ans",
    "length": "...999",
    "description": "Reserved for national use"
  },
  "118": {
    "type": "ans",
    "length": "...999",
    "description": "Reserved for national use"
  },
  "119": {
    "type": "ans",
    "length": "...999",
    "description": "Reserved for national use"
  },
  "120": {
    "type": "ans",
    "length": "...999",
    "description": "Reserved for private use"
  },
  "121": {
    "type": "ans",
    "length": "...999",
    "description": "Reserved for private use"
  },
  "122": {
    "type": "ans",
    "length": "...999",
    "description": "Reserved for private use"
  },
  "123": {
    "type": "ans",
    "length": "...999",
    "description": "Reserved for private use"
  },
  "124": {
    "type": "ans",
    "length": "...999",
    "description": "Reserved for private use"
  },
  "125": {
    "type": "ans",
    "length": "...999",
    "description": "Reserved for private use"
  },
  "126": {
    "type": "ans",
    "length": "...999",
    "description": "Reserved for private use"
  },
  "127": {
    "type": "ans",
    "length": "...999",
    "description": "Reserved for private use"
  },
  "128": {
    "type": "b",
    "length": "64",
    "description": "Message authentication code"
  }
}