{
  "description": "Two original synthetic German teaching passages. Explicit U+017F; not a historical transcription, real scan, customer file, or BookTranslator output.",
  "rendering": "Apple CoreText, 64 px, ligatures enabled, black on white, no artificial degradation.",
  "models": [
    "Fraktur",
    "eng"
  ],
  "settings": {
    "oem": 1,
    "psm": 6,
    "dpi": 300
  },
  "scoring": "NFC and collapse whitespace. Compare exact characters including case and punctuation against two frozen targets: source codepoints, and source with U+017F replaced by U+0073 only. The second is NOT full OCR-D Level 1 and NOT spelling modernization.",
  "samples": [
    {
      "id": "long-s",
      "text": "Das Waſſer iſt klar.\nDie Roſe ſteht am Fenſter.\nBuch 12; Seite 27; Nummer 105."
    },
    {
      "id": "historical-spelling",
      "text": "Die rothe Blume ſteht hier.\nDas Thal iſt weit.\nDer Brief liegt auf dem Tiſch."
    }
  ],
  "experimentDate": "2026-09-11",
  "publicPackagingDate": "2026-09-12",
  "predefinitionEvidence": "The private source configuration was created at 03:10:40.299Z before the first PNG at 03:10:41.110Z and first OCR output at 03:10:41.287Z on 2026-09-11. A preparation-time label was removed from this public configuration because it was not a measured creation timestamp.",
  "originalConfigSha256": "a6ff88bba95685fc95c9b21e36dcff43d99b52d95720b6b30e14b5e60020bc3b"
}