{
  "$schema": "urn:prism:schema:v1:spec",
  "title": "Signup funnel",
  "data": {
    "name": "stages",
    "values": [
      {"stage": "Visit",    "count": 1000},
      {"stage": "Signup",   "count":  400},
      {"stage": "Activate", "count":  200},
      {"stage": "Purchase", "count":  100}
    ]
  },
  "mark": "funnel",
  "encoding": {
    "x":     {"field": "stage", "type": "nominal"},
    "y":     {"field": "count", "type": "quantitative"},
    "color": {"field": "stage", "type": "nominal"}
  }
}