{
  "handle": "Anomaly",
  "mechanism": "A {{datum}} whose observed value falls outside the expected baseline by a measurable deviation score. Anomalies carry the (observed, expected, deviation) triple as first-class structure, so they can be routed, ranked, and triaged. Serves as the trigger artifact for investigation, learning, and diagnostic workflows.",
  "gloss": "Datum whose observed value deviates from the expected baseline, triggering investigation",
  "_meta": {
    "ring": 1,
    "tier": 1,
    "supersedes": [
      "sema:Anomaly#mh:SHA-256:7987f2cd4a353f206fccd038ddac021ef849cfa58e352d2d2d7ba3850b916893"
    ],
    "path": [
      "Infrastructure",
      "Data Structures"
    ]
  },
  "data_schema": {
    "type": "object",
    "required": [
      "observed_value",
      "expected_baseline",
      "deviation_score"
    ],
    "properties": {
      "observed_value": {
        "description": "The data point that triggered detection (any type)"
      },
      "expected_baseline": {
        "description": "The prediction or mean value (any type)"
      },
      "deviation_score": {
        "type": "number",
        "description": "Standard deviations (sigma) or distance metric"
      },
      "detected_at": {
        "type": "string",
        "format": "date-time"
      }
    }
  },
  "sema_id": "sema:Anomaly#mh:SHA-256:459522f7c0225dc99953dbd5cd6c9cbb558d914abbd9d4d979e103984e0739cc",
  "sema_ref": "Anomaly#4595",
  "sema_stub": "4595",
  "dependencies": {
    "references": {
      "datum": "sema:Datum#mh:SHA-256:f90456c1067ac5db4e9825a82a22bc58086022f8acd0d0f63fdfeaeb6be2e937"
    }
  },
  "sema_layer": "Infrastructure",
  "sema_category": "Data Structures",
  "used_by": {
    "references": {
      "Monitor": "sema:Monitor#mh:SHA-256:d31621c43589a14a237d53b3ff53c360b841cea6fe8fa8b7dc90724a686fcf8f",
      "OntologyAdapt": "sema:OntologyAdapt#mh:SHA-256:a541f46f3c1ffe236a27dfaafaffd0d3dc76bf7c3fa086b5e9bcf1a945c85e63"
    }
  }
}