{
  "title": "Census Data API Response Structure",
  "description": "Structure documentation for the Census Data API 2D array response format",
  "type": "array",
  "rows": [
    {
      "index": 0,
      "name": "Header Row",
      "type": "array<string>",
      "description": "Column names: variable names as requested in the ?get= parameter, followed by geography identifier columns (state, county, tract, etc.)"
    },
    {
      "index": "1+",
      "name": "Data Row(s)",
      "type": "array<string|null>",
      "description": "Data values corresponding to the header row. Values are always strings. Geography FIPS codes appear as trailing columns."
    }
  ],
  "notes": [
    "All values are returned as strings, including numeric statistics",
    "Missing or suppressed values are returned as null",
    "Geographic FIPS codes are always appended at the end of each row",
    "Estimate variables end in E (e.g., B01003_001E), margin of error variables end in M",
    "Maximum 50 variables per request"
  ]
}