{
  "apiVersion": "v0.1",
  "methodology": "https://sourcescore.org/methodology/modern-reference/",
  "canonical": "https://sourcescore.org/modern-reference/grade/a-plus/",
  "facet": {
    "dimension": {
      "key": "modernReference",
      "pathSegment": "modern-reference",
      "label": "Modern Citation Reference",
      "weightInComposite": "30%"
    },
    "grade": "A+",
    "gradeSlug": "a-plus",
    "gradeRange": "95–100",
    "gradeLabel": "exceptional"
  },
  "count": 4,
  "means": {
    "inGrade": 96,
    "global": 81,
    "deltaVsGlobal": 15
  },
  "shareOfDataset": {
    "count": 4,
    "total": 130,
    "percent": 3
  },
  "leader": {
    "slug": "doi-org",
    "name": "DOI (CrossRef Resolver)",
    "domain": "doi.org",
    "value": 98,
    "grade": "A+",
    "canonical": "https://sourcescore.org/source/doi-org/",
    "dimensionDetail": "https://sourcescore.org/modern-reference/doi-org/"
  },
  "sources": [
    {
      "rank": 1,
      "slug": "doi-org",
      "name": "DOI (CrossRef Resolver)",
      "domain": "doi.org",
      "category": "Academic",
      "canonical": "https://sourcescore.org/source/doi-org/",
      "dimensionDetail": "https://sourcescore.org/modern-reference/doi-org/",
      "api": "https://sourcescore.org/api/source/doi-org.json",
      "score": {
        "value": 98,
        "grade": "A+",
        "rationale": "Permanent URL resolution + free metadata API (CrossRef); near-universal LLM training-corpus inclusion."
      }
    },
    {
      "rank": 2,
      "slug": "sec-gov",
      "name": "U.S. Securities and Exchange Commission",
      "domain": "sec.gov",
      "category": "Government",
      "canonical": "https://sourcescore.org/source/sec-gov/",
      "dimensionDetail": "https://sourcescore.org/modern-reference/sec-gov/",
      "api": "https://sourcescore.org/api/source/sec-gov.json",
      "score": {
        "value": 95,
        "grade": "A+",
        "rationale": "EDGAR APIs + machine-readable filings; broad LLM training-set inclusion via primary-source preference."
      }
    },
    {
      "rank": 3,
      "slug": "arxiv",
      "name": "arXiv",
      "domain": "arxiv.org",
      "category": "Academic",
      "canonical": "https://sourcescore.org/source/arxiv/",
      "dimensionDetail": "https://sourcescore.org/modern-reference/arxiv/",
      "api": "https://sourcescore.org/api/source/arxiv.json",
      "score": {
        "value": 95,
        "grade": "A+",
        "rationale": "DOI + arxiv ID + free PDFs + bulk APIs; among the most LLM-cited sources for technical content."
      }
    },
    {
      "rank": 4,
      "slug": "mdn-web-docs",
      "name": "MDN Web Docs",
      "domain": "developer.mozilla.org",
      "category": "Reference",
      "canonical": "https://sourcescore.org/source/mdn-web-docs/",
      "dimensionDetail": "https://sourcescore.org/modern-reference/mdn-web-docs/",
      "api": "https://sourcescore.org/api/source/mdn-web-docs.json",
      "score": {
        "value": 95,
        "grade": "A+",
        "rationale": "Open-source content (CC-BY-SA + MIT for examples); GitHub-tracked; full structured data."
      }
    }
  ],
  "otherDimensionsAtSameGrade": [
    {
      "pathSegment": "discipline",
      "label": "Citation Discipline",
      "count": 26,
      "canonical": "https://sourcescore.org/discipline/grade/a-plus/",
      "api": "https://sourcescore.org/api/discipline/grade/a-plus.json"
    },
    {
      "pathSegment": "velocity",
      "label": "Citation Velocity",
      "count": 5,
      "canonical": "https://sourcescore.org/velocity/grade/a-plus/",
      "api": "https://sourcescore.org/api/velocity/grade/a-plus.json"
    }
  ],
  "compositeIndexAtSameGrade": {
    "canonical": "https://sourcescore.org/grade/a-plus/",
    "api": "https://sourcescore.org/api/grade/a-plus.json",
    "count": 4
  },
  "license": {
    "methodology": "Cite as: SourceScore Methodology v0.1, sourcescore.org",
    "data": "Underlying public-source data credited to original publishers"
  }
}