{
  "$schema": "https://json-structure.org/meta/extended/v0/#",
  "$id": "https://raw.githubusercontent.com/api-evangelist/energy-utilities/refs/heads/main/json-structure/energy-utilities-meter-reading-structure.json",
  "name": "MeterReading",
  "type": "object",
  "description": "JSON Structure representation of a meter reading in the energy-utilities topic catalog.",
  "properties": {
    "id": { "type": "string", "description": "Provider-scoped identifier for this reading." },
    "usagePointId": { "type": "string", "description": "Reference to the UsagePoint that produced this reading." },
    "meterId": { "type": "string", "description": "Optional physical meter identifier." },
    "readingType": {
      "type": "string",
      "description": "Semantic classification aligned with ESPI ReadingType.",
      "enum": [
        "electricity.usage",
        "electricity.demand",
        "electricity.delivered",
        "electricity.received",
        "electricity.net",
        "electricity.reactive",
        "natural-gas.usage",
        "water.usage",
        "steam.usage",
        "thermal.usage"
      ]
    },
    "intervalStart": { "type": "string", "format": "date-time", "description": "UTC start of the measurement interval." },
    "intervalLength": { "type": "int32", "description": "Duration of the interval in seconds. 0 means instantaneous." },
    "value": { "type": "decimal", "description": "Measured quantity in the units identified by unit." },
    "unit": {
      "type": "string",
      "description": "Unit of measure.",
      "enum": ["Wh", "kWh", "MWh", "W", "kW", "MW", "VARh", "kVARh", "VA", "kVA", "ccf", "therms", "MMBtu", "m3", "gallons", "liters"]
    },
    "quality": {
      "type": "string",
      "enum": ["valid", "estimated", "missing", "questionable", "raw", "validated", "edited"]
    },
    "source": {
      "type": "string",
      "enum": ["ami", "amr", "manual", "estimated", "third-party", "green-button"]
    },
    "powerOfTenMultiplier": { "type": "int32" },
    "tariffRider": { "type": "string" },
    "providerId": { "type": "string" }
  },
  "required": [
    "id",
    "usagePointId",
    "readingType",
    "intervalStart",
    "intervalLength",
    "value",
    "unit"
  ]
}