{
  "schemaVersion": "1.0",
  "benchmarkVersion": "2026-07-31",
  "corpusSelection": "Deterministic stratified sample followed by a rendered-page review for English language, legibility, and the declared layout group.",
  "metrics": {
    "digitalTextFidelity": "NFKC-normalized, case-folded token-multiset F1 against the embedded PDF text layer; token order is ignored.",
    "scannedTextRecall": "Pass rate for verified present-text assertions on the six scanned pages.",
    "readingOrder": "Pass rate where both verified snippets appear and the before snippet precedes the after snippet.",
    "headingHierarchy": "Pass rate for manually annotated heading text and relative Markdown heading levels.",
    "tableStructure": "Pass rate for verified cells and declared adjacent or row/column heading relationships inside parsed Markdown or HTML tables.",
    "markdownParseSuccess": "Whether markdown-it 14.1.0 parses the full output without throwing.",
    "runtime": "Wall-clock conversion time after one warm-up conversion; initialization and warm-up are excluded."
  },
  "aggregation": "Each metric reports its own applicable denominator. The benchmark does not calculate an overall score, ranking, or winner.",
  "sourceAssertionsOutsideDeclaredMetrics": {
    "absent": "Header and footer exclusion assertions remain in the public source-assertion file but are not included in the six declared metrics.",
    "math": "Math assertions remain in the public source-assertion file but are not included in the six declared metrics."
  }
}