{
  "$schema": "urn:prism:schema:v1:spec",
  "title": "Thresholds (rule basic)",
  "data": {
    "name": "thresholds",
    "values": [
      {"label": "low",  "score": 0.4},
      {"label": "mid",  "score": 0.55},
      {"label": "high", "score": 0.7}
    ]
  },
  "mark": "rule",
  "encoding": {
    "y": {"field": "score", "type": "quantitative"}
  }
}