{
  "$schema": "urn:prism:schema:v1:spec",
  "title": "Region facets with independent y-domains",
  "data": {
    "name": "samples",
    "values": [
      {"region": "NA", "brand": "alpha", "score": 0.42},
      {"region": "NA", "brand": "beta",  "score": 0.55},
      {"region": "EU", "brand": "alpha", "score": 9.8},
      {"region": "EU", "brand": "beta",  "score": 12.4}
    ]
  },
  "facet":   {"column": {"field": "region", "type": "nominal"}},
  "resolve": {"scale": {"y": "independent"}},
  "spec": {
    "$schema": "urn:prism:schema:v1:spec",
    "mark": "bar",
    "encoding": {
      "x": {"field": "brand", "type": "nominal"},
      "y": {"field": "score", "type": "quantitative"}
    }
  }
}