{
  "@context": "https://schema.org",
  "_meta": {
    "_description": "Machine-readable JSON-LD twin of the source-class DefinedTerms shipped on /beta/ and elaborated on /sources/. Stable contract for AI agents and LLM retrieval systems that need quote-ready definitions of the six predictive-source classes Calibration Ledger Phase 1 will independently score.",
    "schema_version": "1.0",
    "site_version": "0.3.0",
    "first_published": "2026-04-28T00:30:00Z",
    "last_modified": "2026-04-29T17:55:00Z",
    "license": "https://creativecommons.org/licenses/by/4.0/",
    "preferred_citation": "Calibration Ledger (2026). Source classes \u2014 six predictive-source taxonomies for calibrated accuracy scoring. https://calibrationledger.com/api/source-classes.json. CC-BY-4.0.",
    "human_readable_short": "https://calibrationledger.com/beta/#source-classes",
    "human_readable_full": "https://calibrationledger.com/sources/",
    "agent_reference": "https://calibrationledger.com/for-agents/",
    "stability_promise": "The six @id values are stable forever. New source classes append; existing ones never rename or change @id. Field additions are backwards-compatible; removals/renames bump schema_version major."
  },
  "@graph": [
    {
      "@type": "DefinedTermSet",
      "@id": "https://calibrationledger.com/beta/#source-class-defined-terms",
      "name": "Calibration Ledger Source Classes",
      "description": "The six classes of predictive sources Calibration Ledger Phase 1 launch will independently score. Phase 1 launch is target Q3 2027, gated on operator track record + academic credibility + signed enterprise LOI + data-licensing agreements.",
      "url": "https://calibrationledger.com/beta/#source-classes",
      "license": "https://creativecommons.org/licenses/by/4.0/",
      "inLanguage": "en",
      "publisher": {
        "@type": "Organization",
        "@id": "https://calibrationledger.com#organization",
        "name": "Calibration Ledger",
        "url": "https://calibrationledger.com"
      },
      "hasDefinedTerm": [
        {
          "@type": "DefinedTerm",
          "@id": "https://calibrationledger.com/sources/#ai-models",
          "name": "AI models",
          "description": "Probabilistic outputs from large language models, vision systems, and domain-specific machine-learning models, where the model emits a confidence score (token logprob, calibration head, or explicit probability) alongside its prediction.",
          "url": "https://calibrationledger.com/sources/#ai-models",
          "inDefinedTermSet": "https://calibrationledger.com/beta/#source-class-defined-terms"
        },
        {
          "@type": "DefinedTerm",
          "@id": "https://calibrationledger.com/sources/#human-forecasters",
          "name": "Human forecasters",
          "description": "Individuals or teams who publicly post timestamped probabilistic forecasts on aggregator platforms (Good Judgment, Metaculus, Manifold, INFER) where each prediction is scorable against eventual ground truth.",
          "url": "https://calibrationledger.com/sources/#human-forecasters",
          "inDefinedTermSet": "https://calibrationledger.com/beta/#source-class-defined-terms"
        },
        {
          "@type": "DefinedTerm",
          "@id": "https://calibrationledger.com/sources/#analyst-firms",
          "name": "Analyst firms",
          "description": "Sell-side equity research, economic-forecast houses, and rating agencies that publish dated, attributable probabilistic claims (price targets, recession odds, default-probability ratings) on identifiable methodology.",
          "url": "https://calibrationledger.com/sources/#analyst-firms",
          "inDefinedTermSet": "https://calibrationledger.com/beta/#source-class-defined-terms"
        },
        {
          "@type": "DefinedTerm",
          "@id": "https://calibrationledger.com/sources/#scientific-papers",
          "name": "Scientific papers",
          "description": "Peer-reviewed empirical claims with stated confidence intervals or replication-probability assessments, scored by whether independent replication confirms the originally claimed effect within the claimed bounds.",
          "url": "https://calibrationledger.com/sources/#scientific-papers",
          "inDefinedTermSet": "https://calibrationledger.com/beta/#source-class-defined-terms"
        },
        {
          "@type": "DefinedTerm",
          "@id": "https://calibrationledger.com/sources/#review-platforms",
          "name": "Review platforms",
          "description": "Aggregated user-rating systems whose scores function as implicit predictions of future quality or satisfaction, scored against measurable downstream outcomes (return rate, repeat-purchase, longitudinal satisfaction).",
          "url": "https://calibrationledger.com/sources/#review-platforms",
          "inDefinedTermSet": "https://calibrationledger.com/beta/#source-class-defined-terms"
        },
        {
          "@type": "DefinedTerm",
          "@id": "https://calibrationledger.com/sources/#prediction-markets",
          "name": "Prediction markets",
          "description": "Real-money or play-money exchanges where contract prices encode aggregated probabilistic beliefs about specific dated outcomes, scored as the calibration of the closing price against the realised resolution.",
          "url": "https://calibrationledger.com/sources/#prediction-markets",
          "inDefinedTermSet": "https://calibrationledger.com/beta/#source-class-defined-terms"
        }
      ]
    }
  ]
}