{
  "$schema": "urn:prism:schema:v1:spec",
  "title": "Team velocity vs target",
  "datasets": {
    "actuals": {"values": [
      {"team": "alpha", "velocity": 32},
      {"team": "beta", "velocity": 41},
      {"team": "gamma", "velocity": 28},
      {"team": "delta", "velocity": 47}
    ]},
    "target": {"values": [{"velocity": 40}]}
  },
  "layer": [
    {
      "$schema": "urn:prism:schema:v1:spec",
      "data": {"name": "actuals"},
      "mark": "bar",
      "encoding": {
        "x": {"field": "team", "type": "nominal"},
        "y": {"field": "velocity", "type": "quantitative"}
      }
    },
    {
      "$schema": "urn:prism:schema:v1:spec",
      "data": {"name": "target"},
      "mark": "rule",
      "encoding": {
        "y": {"field": "velocity", "type": "quantitative"}
      }
    }
  ]
}