{
  "accessibility_fallback": "The reviewed category table contains 364633788 citation memberships across 529402 category rows.",
  "audience": "Readers navigating category-level citation and article structure.",
  "card_id": "category-structure",
  "caveats": [
    "Category membership counts are multiplicative and must not be read as distinct corpus totals.",
    "The card describes observed category rows without inferring category quality causally."
  ],
  "claim_grade": "C1-observed",
  "primary_metric": {
    "denominator": 529402,
    "estimator": "Arithmetic mean across reviewed category rows.",
    "label": "Mean category-membership citation count",
    "numerator": 364633788,
    "uncertainty": "Category memberships overlap, so totals are multiplicative rather than distinct.",
    "unit": "membership citations per category row",
    "value": "688.7654"
  },
  "schema_version": 1,
  "source_configs": [
    "categories"
  ],
  "supporting_metrics": [
    {
      "denominator": 529402,
      "estimator": "Arithmetic mean across reviewed category rows.",
      "label": "Mean article memberships per category row",
      "numerator": 28515538,
      "uncertainty": "An article may contribute to more than one category.",
      "unit": "article memberships per category row",
      "value": "53.8637"
    }
  ],
  "title": "Category quality and structure"
}