{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://raw.githubusercontent.com/api-evangelist/dagster/refs/heads/main/json-schema/asset-observation.json",
  "title": "AssetObservation",
  "description": "A reported observation event for an external asset in Dagster.",
  "type": "object",
  "required": ["asset_key"],
  "properties": {
    "asset_key": {
      "type": "string",
      "description": "The asset key being observed."
    },
    "metadata": {
      "type": "object",
      "description": "Free-form key/value metadata about the observation.",
      "additionalProperties": true
    },
    "data_version": {
      "type": "string",
      "description": "A user-supplied data version identifier."
    },
    "description": {
      "type": "string",
      "description": "A human-readable description of the observation."
    },
    "partition": {
      "type": "string",
      "description": "The asset partition associated with the observation."
    }
  }
}