{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://raw.githubusercontent.com/api-evangelist/cumulocity/main/json-schema/cumulocity-measurement-schema.json",
  "title": "Cumulocity Measurement",
  "description": "A time-stamped data point reported by a Cumulocity-connected device. Measurements are fragment-extensible — custom fragments contain typed series with value+unit pairs.",
  "type": "object",
  "required": ["time", "type", "source"],
  "properties": {
    "id": {"type": "string", "readOnly": true},
    "self": {"type": "string", "format": "uri", "readOnly": true},
    "time": {"type": "string", "format": "date-time"},
    "type": {"type": "string", "description": "Measurement type, e.g. c8y_Temperature, c8y_SignalStrength."},
    "source": {
      "type": "object",
      "required": ["id"],
      "properties": {
        "id": {"type": "string"},
        "self": {"type": "string", "format": "uri"}
      }
    },
    "c8y_Temperature": {
      "type": "object",
      "properties": {
        "T": {
          "type": "object",
          "properties": {
            "value": {"type": "number"},
            "unit": {"type": "string", "examples": ["C", "F"]}
          }
        }
      }
    },
    "c8y_SignalStrength": {
      "type": "object",
      "properties": {
        "rssi": {
          "type": "object",
          "properties": {
            "value": {"type": "number"},
            "unit": {"type": "string", "examples": ["dBm"]}
          }
        }
      }
    }
  },
  "additionalProperties": true
}