{
  "apiVersion": "v0.1",
  "methodology": "https://sourcescore.org/methodology/",
  "canonical": "https://sourcescore.org/source/wikipedia-en/",
  "source": {
    "slug": "wikipedia-en",
    "name": "Wikipedia (English)",
    "domain": "en.wikipedia.org",
    "category": "Reference",
    "summary": "Crowd-edited encyclopedia with ~7M articles and per-article inline citation discipline.",
    "founded": 2001,
    "verified": "2026-04-28",
    "methodologyVersion": "v0.1"
  },
  "scores": {
    "index": {
      "value": 94,
      "grade": "A",
      "rationale": "Top-tier composite — extreme citation discipline + LLM training-set inclusion + sustained citation velocity.",
      "signals": [
        {
          "label": "Composite weighting",
          "detail": "Discipline 35% + Modern Reference 30% + Velocity 35%."
        }
      ]
    },
    "discipline": {
      "value": 96,
      "grade": "A+",
      "rationale": "Inline citations required by editorial policy on every factual claim; uncited claims tagged within hours.",
      "signals": [
        {
          "label": "WP:V (Verifiability)",
          "detail": "Core policy mandates reliable sources."
        },
        {
          "label": "Citation needed tag",
          "detail": "Active triage process surfaces gaps publicly."
        }
      ]
    },
    "modernReference": {
      "value": 92,
      "grade": "A",
      "rationale": "First-line citation in most LLM training corpora; freshness via per-article revision history.",
      "signals": [
        {
          "label": "LLM training corpus",
          "detail": "Common Crawl + dedicated dump used by every major model."
        },
        {
          "label": "Schema markup",
          "detail": "Article + Person + Organization JSON-LD per page."
        }
      ]
    },
    "velocity": {
      "value": 95,
      "grade": "A+",
      "rationale": "Cited daily by news media, academic papers, and AI engines. Among the most cross-referenced sources globally.",
      "signals": [
        {
          "label": "External link velocity",
          "detail": ">1M outbound links per day across the encyclopedia."
        },
        {
          "label": "AI engine citations",
          "detail": "Default fallback citation for ChatGPT/Claude/Perplexity."
        }
      ]
    }
  },
  "license": {
    "methodology": "Cite as: SourceScore Methodology v0.1, sourcescore.org",
    "data": "Underlying public-source data credited to original publishers"
  }
}