{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://how-everything-evolved.invalid/schemas/boundary.schema.json",
  "title": "Time-bounded historical geometry",
  "type": "object",
  "required": ["name", "from_year", "to_year", "geometry", "source_keys", "notes"],
  "properties": {
    "name": { "type": "string", "minLength": 1 },
    "from_year": { "type": "integer" },
    "to_year": { "type": "integer" },
    "geometry": { "type": "object" },
    "source_keys": { "type": "array", "minItems": 1, "items": { "type": "string", "minLength": 1 } },
    "notes": { "type": "string", "minLength": 1 }
  },
  "additionalProperties": true
}