{
  "$schema": "urn:prism:schema:v1:spec",
  "title": "Brand tracker: wide metrics reshaped, then dodged by series",
  "data": {
    "values": [
      {"series": "Northwind",        "awareness": 68, "consideration": 47, "familiarity": 61, "trust": 72},
      {"series": "Category average", "awareness": 54, "consideration": 51, "familiarity": 57, "trust": 58}
    ]
  },
  "transform": [
    {
      "unpivot": ["awareness", "consideration", "familiarity", "trust"],
      "as": ["metric", "score"]
    }
  ],
  "mark": "bar",
  "encoding": {
    "x": {"field": "metric", "type": "nominal"},
    "y": {"field": "score", "type": "quantitative"},
    "x_offset": {
      "field": "series",
      "type": "nominal",
      "scale": {"domain": ["Northwind", "Category average"]}
    },
    "color": {
      "field": "series",
      "type": "nominal",
      "scale": {"domain": ["Northwind", "Category average"]}
    }
  }
}