{
  "$schema": "urn:prism:schema:v1:spec",
  "title": "Revenue by quarter, stacked by segment",
  "data": {
    "values": [
      {"quarter": "Q1", "segment": "enterprise", "revenue": 120},
      {"quarter": "Q2", "segment": "enterprise", "revenue": 145},
      {"quarter": "Q3", "segment": "enterprise", "revenue": 138},
      {"quarter": "Q4", "segment": "enterprise", "revenue": 172},
      {"quarter": "Q1", "segment": "mid-market", "revenue": 100},
      {"quarter": "Q2", "segment": "mid-market", "revenue": 120},
      {"quarter": "Q3", "segment": "mid-market", "revenue": 165},
      {"quarter": "Q4", "segment": "mid-market", "revenue": 190},
      {"quarter": "Q1", "segment": "self-serve", "revenue": 64},
      {"quarter": "Q2", "segment": "self-serve", "revenue": 71},
      {"quarter": "Q3", "segment": "self-serve", "revenue": 88},
      {"quarter": "Q4", "segment": "self-serve", "revenue": 95}
    ]
  },
  "mark": "bar",
  "encoding": {
    "x": {"field": "quarter", "type": "nominal"},
    "y": {"aggregate": "sum", "field": "revenue", "type": "quantitative", "stack": "zero"},
    "color": {"field": "segment", "type": "nominal"}
  }
}