{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://schema.nfh.global/EnergyResourceMeter/v1.1",
  "title": "EnergyResourceMeter",
  "description": "Typed schema for metering-point energy resources (type = METER). v1.1: inherits EnergyResourceCommon/v1.1 so common power fields (ratedPower, maxExport, maxImport) are now QuantitativeValue objects. CIM: cim:Meter extends cim:EndDevice (IEC 61968-9).",
  "allOf": [
    { "$ref": "https://schema.nfh.global/EnergyResourceCommon/v1.1#EnergyResourceCommon" },
    {
      "type": "object",
      "required": ["id", "type"],
      "properties": {
        "type": {
          "type": "string",
          "const": "METER",
          "description": "Asset-class discriminator. Must be \"METER\". CIM: cim:Meter (IEC 61968-9 EndDevice subtype)."
        },
        "attributes": { "$ref": "#/$defs/EnergyResourceMeterAttributes" }
      }
    }
  ],
  "$defs": {
    "EnergyResourceMeterAttributes": {
      "allOf": [
        { "$ref": "https://schema.nfh.global/EnergyResourceCommon/v1.1#EnergyResourceCommonAttributes" },
        {
          "type": "object",
          "additionalProperties": true,
          "description": "Attributes for METER resources. Common power fields inherited from EnergyResourceCommon/v1.1.",
          "properties": {
            "meterCapability": {
              "type": "string",
              "enum": ["Electromechanical", "CMRI", "AMR", "AMI"],
              "description": "Communication/automation generation. CIM: AmiBillingReadyKind (IEC 61968-9)."
            },
            "energyDirection": {
              "type": "string",
              "enum": ["Forward", "Reverse", "Bidirectional", "Net"],
              "default": "Forward",
              "description": "Energy flow direction. CIM: FlowDirectionKind (ESPI NAESB REQ.21)."
            },
            "functions": {
              "type": "array",
              "uniqueItems": true,
              "description": "Active meter capabilities per IEC 61968-9 EndDeviceFunction[0..*].",
              "items": { "type": "string", "enum": ["ToU", "NetMetering", "MaxDemand", "LoadControl", "TamperDetection", "PowerQuality", "EventLogging"] }
            },
            "feeder":                  { "type": "string", "description": "Feeder identifier this meter is supplied from." },
            "bus":                     { "type": "string", "description": "Busbar identifier." },
            "communicationTechnology": { "type": "string", "enum": ["PLC", "RF_Mesh", "GPRS", "NB-IoT", "LoRa", "ZigBee", "Other"] },
            "applicationProtocol":     { "type": "string", "enum": ["DLMS_COSEM", "ANSI_C12_18", "IEC_61850", "Modbus", "Other"] }
          }
        }
      ]
    }
  }
}