{
  "$schema": "urn:prism:schema:v1:spec",
  "title": "Brand score (Q4) — swap dataset to animate to Q1",
  "description": "Tween demo. Re-render with the Q1 dataset and the bars animate to their new heights, keyed on brand_id.",
  "data": {
    "name": "brand_scores_q4",
    "values": [
      {"brand_id": "alpha",   "score": 0.42},
      {"brand_id": "beta",    "score": 0.71},
      {"brand_id": "gamma",   "score": 0.58},
      {"brand_id": "delta",   "score": 0.33},
      {"brand_id": "epsilon", "score": 0.65}
    ]
  },
  "mark": {"type": "bar", "corner_radius": 4},
  "encoding": {
    "x":     {"field": "brand_id", "type": "nominal", "key": true},
    "y":     {"field": "score",    "type": "quantitative", "scale": {"domain": [0, 1]}},
    "color": {"field": "brand_id", "type": "nominal"}
  },
  "animation": {"duration_ms": 600, "easing": "cubic_in_out"}
}