{
  "$schema": "urn:prism:schema:v1:spec",
  "title": "Two panels side-by-side (hconcat)",
  "hconcat": [
    {
      "$schema": "urn:prism:schema:v1:spec",
      "title": "Quarter sales",
      "data": {"values": [
        {"q": "Q1", "sales": 120},
        {"q": "Q2", "sales": 180},
        {"q": "Q3", "sales": 210},
        {"q": "Q4", "sales": 260}
      ]},
      "mark": "bar",
      "encoding": {
        "x": {"field": "q",     "type": "nominal"},
        "y": {"field": "sales", "type": "quantitative"}
      }
    },
    {
      "$schema": "urn:prism:schema:v1:spec",
      "title": "Region share",
      "data": {"values": [
        {"region": "NA",    "share": 0.42},
        {"region": "EMEA",  "share": 0.30},
        {"region": "APAC",  "share": 0.18},
        {"region": "LATAM", "share": 0.10}
      ]},
      "mark": "bar",
      "encoding": {
        "x": {"field": "region", "type": "nominal"},
        "y": {"field": "share",  "type": "quantitative"}
      }
    }
  ]
}