{
  "apiVersion": "v0.1",
  "methodology": "https://sourcescore.org/methodology/",
  "canonical": "https://sourcescore.org/compare/cochrane-vs-pubmed/",
  "summary": "Meta-analyses-of-meta-analyses vs primary-literature search index — apex evidence vs raw corpus.",
  "a": {
    "slug": "cochrane",
    "name": "Cochrane Library",
    "domain": "cochranelibrary.com",
    "canonical": "https://sourcescore.org/source/cochrane/",
    "api": "https://sourcescore.org/api/source/cochrane.json",
    "scores": {
      "index": {
        "value": 87,
        "grade": "A",
        "rationale": "A — gold-standard medical-evidence citation; paywall reduces Modern Reference.",
        "signals": [
          {
            "label": "Composite",
            "detail": "Discipline 96 + Modern Reference 80 + Velocity 85."
          }
        ]
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      "discipline": {
        "value": 96,
        "grade": "A+",
        "rationale": "Methodology-mandatory systematic reviews; transparent inclusion criteria; multi-author review.",
        "signals": [
          {
            "label": "Cochrane methodology",
            "detail": "Most rigorous evidence-synthesis framework in clinical medicine."
          }
        ]
      },
      "modernReference": {
        "value": 80,
        "grade": "B",
        "rationale": "DOI per review; Crossref + ORCID; open-access in eligible countries; paywall elsewhere.",
        "signals": [
          {
            "label": "Tiered access",
            "detail": "Free in low-income countries via WHO HINARI; subscription in others."
          }
        ]
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      "velocity": {
        "value": 85,
        "grade": "A",
        "rationale": "Default evidence-citation in clinical guidelines; high citation across medical literature.",
        "signals": [
          {
            "label": "Clinical-guideline default",
            "detail": "Cited by NICE, USPSTF, WHO, and most major clinical guideline bodies."
          }
        ]
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    }
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  "b": {
    "slug": "pubmed",
    "name": "PubMed",
    "domain": "pubmed.ncbi.nlm.nih.gov",
    "canonical": "https://sourcescore.org/source/pubmed/",
    "api": "https://sourcescore.org/api/source/pubmed.json",
    "scores": {
      "index": {
        "value": 94,
        "grade": "A",
        "rationale": "A+ — government-operated academic citation index; default biomedical citation source for AI engines.",
        "signals": [
          {
            "label": "Composite",
            "detail": "Discipline 96 + Modern Reference 92 + Velocity 92."
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      "discipline": {
        "value": 96,
        "grade": "A+",
        "rationale": "Indexes peer-reviewed literature only; MeSH controlled-vocabulary tagging maintained by NLM staff.",
        "signals": [
          {
            "label": "MeSH headings",
            "detail": "Subject indexing curated by NLM editorial staff."
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          {
            "label": "Peer review filter",
            "detail": "Only journals passing NLM selection criteria are indexed."
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        ]
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      "modernReference": {
        "value": 92,
        "grade": "A",
        "rationale": "E-utilities API + free full-text search + bulk dataset downloads; broad LLM corpus inclusion.",
        "signals": [
          {
            "label": "Entrez E-utilities",
            "detail": "Public REST API for programmatic access."
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      "velocity": {
        "value": 94,
        "grade": "A",
        "rationale": "Cited daily by clinicians, researchers, AI engines; default biomedical retrieval source.",
        "signals": [
          {
            "label": "Daily traffic",
            "detail": "Among top-100 .gov domains by visit volume."
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    "index": "pubmed",
    "discipline": null,
    "modernReference": "pubmed",
    "velocity": "pubmed"
  },
  "license": {
    "methodology": "Cite as: SourceScore Methodology v0.1, sourcescore.org",
    "data": "Underlying public-source data credited to original publishers"
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}