{ "metadata": { "document_type": "book_chapter", "document_type_confidence": 0.78, "document_type_reasons": [ "page count 3 in range [5, 1000]", "text matches '^Chapter \\d+' pattern", "structural.heading_depth in range [1, 5]", "no exclusion patterns matched" ], "profile_name": "book_chapter", "profile_version": "1.0.0", "profile_fields": { "title": "Cellular Respiration", "chapter_number": "7", "author": "Prof. Michael Chen & Dr. Lisa Rodriguez", "sections": [ "Glycolysis", "The Krebs Cycle", "Electron Transport Chain", "ATP Production" ] } } }