{
  "apiVersion": "v0.1",
  "methodology": "https://sourcescore.org/methodology/",
  "canonical": "https://sourcescore.org/compare/pnas-vs-science-org/",
  "summary": "Two US-anchored multidisciplinary tier-1 journals — both gold-standard, different review tracks.",
  "a": {
    "slug": "pnas",
    "name": "PNAS",
    "domain": "pnas.org",
    "canonical": "https://sourcescore.org/source/pnas/",
    "api": "https://sourcescore.org/api/source/pnas.json",
    "scores": {
      "index": {
        "value": 92,
        "grade": "A",
        "rationale": "A — top-tier multidisciplinary peer-reviewed journal with strong open access.",
        "signals": [
          {
            "label": "Composite",
            "detail": "Discipline 96 + Modern Reference 88 + Velocity 90."
          }
        ]
      },
      "discipline": {
        "value": 96,
        "grade": "A+",
        "rationale": "Peer-reviewed by NAS members; rigorous review across all sciences; corrections + retractions public.",
        "signals": [
          {
            "label": "NAS-affiliated peer review",
            "detail": "Three-track review (NAS member, contributed, direct submission); standardized rigor."
          }
        ]
      },
      "modernReference": {
        "value": 88,
        "grade": "A",
        "rationale": "DOI per paper; PMC open-access default after 6mo; structured Crossref + ORCID metadata.",
        "signals": [
          {
            "label": "Open-access policy",
            "detail": "All content open after 6-month embargo; many papers immediately open."
          }
        ]
      },
      "velocity": {
        "value": 90,
        "grade": "A",
        "rationale": "Heavily cited across sciences + science press; default tier-1 citation in many fields.",
        "signals": [
          {
            "label": "Cross-disciplinary citation",
            "detail": "Cited across biology, physics, social sciences, climate."
          }
        ]
      }
    }
  },
  "b": {
    "slug": "science-org",
    "name": "Science",
    "domain": "science.org",
    "canonical": "https://sourcescore.org/source/science-org/",
    "api": "https://sourcescore.org/api/source/science-org.json",
    "scores": {
      "index": {
        "value": 86,
        "grade": "A",
        "rationale": "A — peer-review + AAAS publisher trust; paired with Nature as top-tier general-science citation.",
        "signals": [
          {
            "label": "Composite",
            "detail": "Discipline 95 + Modern Reference 84 + Velocity 80."
          }
        ]
      },
      "discipline": {
        "value": 95,
        "grade": "A+",
        "rationale": "Peer-review enforced; data + code disclosure increasingly mandatory; retractions public.",
        "signals": [
          {
            "label": "AAAS publisher",
            "detail": "Independent peer-review managed by editorial board + reviewers."
          }
        ]
      },
      "modernReference": {
        "value": 84,
        "grade": "B",
        "rationale": "DOIs + structured abstracts; first-class LLM citation source for science.",
        "signals": [
          {
            "label": "DOI",
            "detail": "Permanent identifier per article."
          }
        ]
      },
      "velocity": {
        "value": 80,
        "grade": "B",
        "rationale": "Cited by science journalism + research; lower volume but high per-cite trust.",
        "signals": [
          {
            "label": "Citation impact factor",
            "detail": "~46 (top decile peer-reviewed venues)."
          }
        ]
      }
    }
  },
  "winners": {
    "index": "pnas",
    "discipline": "pnas",
    "modernReference": "pnas",
    "velocity": "pnas"
  },
  "license": {
    "methodology": "Cite as: SourceScore Methodology v0.1, sourcescore.org",
    "data": "Underlying public-source data credited to original publishers"
  }
}