{
  "$schema": "urn:prism:schema:v1:spec",
  "data": {
    "name": "weekly",
    "values": [
      {"day": "Mon", "v": 12},
      {"day": "Tue", "v": 18},
      {"day": "Wed", "v": 9},
      {"day": "Thu", "v": 22},
      {"day": "Fri", "v": 28},
      {"day": "Sat", "v": 14},
      {"day": "Sun", "v": 7}
    ]
  },
  "mark": "sparkarea",
  "encoding": {
    "x": {"field": "day", "type": "nominal"},
    "y": {"field": "v", "type": "quantitative"}
  }
}