{
  "$schema": "urn:prism:schema:v1:spec",
  "title": "Brand score (point-select highlight)",
  "data": {
    "name": "scores",
    "values": [
      {"brand_id": "alpha",   "score": 0.42},
      {"brand_id": "beta",    "score": 0.71},
      {"brand_id": "gamma",   "score": 0.58},
      {"brand_id": "delta",   "score": 0.34},
      {"brand_id": "epsilon", "score": 0.66}
    ]
  },
  "selection": {
    "highlight": {
      "type": "point",
      "fields": ["brand_id"],
      "toggle": true,
      "encodings": ["color"],
      "on": "click"
    }
  },
  "mark": "bar",
  "encoding": {
    "x":     {"field": "brand_id", "type": "nominal"},
    "y":     {"field": "score",    "type": "quantitative"},
    "color": {"field": "brand_id", "type": "nominal"}
  }
}