{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://how-everything-evolved.invalid/schemas/citation.schema.json",
  "title": "Source-registry citation",
  "type": "object",
  "required": ["key", "author_or_source", "title", "year", "url", "use_in_model"],
  "properties": {
    "key": { "type": "string", "pattern": "^[A-Z0-9_]+$" },
    "author_or_source": { "type": "string", "minLength": 1 },
    "title": { "type": "string", "minLength": 1 },
    "year": { "type": "string", "minLength": 1 },
    "url": { "type": "string", "format": "uri" },
    "use_in_model": { "type": "string", "minLength": 1 }
  },
  "additionalProperties": false
}