{"version":1,"source":"Project-authored synthetic JPEG. Four colored, labeled corners make the eight EXIF transforms visible; the embedded purple thumbnail is a separate image.","scope":"Three representative task scenes and source-defined controls; not independent camera captures or an accuracy benchmark.","scenes":[{"id":"S-H02-CAMERA","label":"Known camera record and separate thumbnail","inputs":[{"path":"/samples/photo-metadata/date-offset.jpg","bytes":9473,"sha256":"00a28024f077c9a9d0b4922f4469f47492537f041e9debced0614491a9c27294","actual":{"dates":{"status":"read","records":[{"id":"EXIF1:IFD0:0x0132:1","source":"JPEG APP1 EXIF 1, IFD0 0x132","kind":"modified","raw":"2020:01:02 12:00:00","subseconds":null,"offset":"+05:30","localDateTime":"2020-01-02T12:00:00","utcIso":"2020-01-02T06:30:00Z","valid":true,"warnings":[]},{"id":"EXIF1:EXIF:0x9003:1","source":"JPEG APP1 EXIF 1, EXIF 0x9003","kind":"capture","raw":"2020:01:02 10:20:30","subseconds":"123456789","offset":"+05:30","localDateTime":"2020-01-02T10:20:30.123456789","utcIso":"2020-01-02T04:50:30.123456789Z","valid":true,"warnings":[]},{"id":"EXIF1:EXIF:0x9004:1","source":"JPEG APP1 EXIF 1, EXIF 0x9004","kind":"digitized","raw":"2020:01:02 10:21:00","subseconds":null,"offset":"+05:30","localDateTime":"2020-01-02T10:21:00","utcIso":"2020-01-02T04:51:00Z","valid":true,"warnings":[]}],"conflicts":[],"warnings":[]},"orientation":{"encodedWidth":240,"encodedHeight":160,"tag":6,"outputWidth":160,"outputHeight":240},"thumbnail":{"status":"read","warnings":[],"images":[{"width":48,"height":32,"tiffOffset":300,"length":1193}]}}}],"source":"cameraJpegExample({dates:'offset',orientation:6,thumbnail:'present'}), camera fixtures v1; self-authored 240×160 chart","expected":{"captureRaw":"2020:01:02 10:20:30","offset":"+05:30","subseconds":"123456789","utc":"2020-01-02T04:50:30.123456789Z","orientationInput":[240,160],"orientationOutput":[160,240],"thumbnail":{"dimensions":[48,32],"tiffOffset":300,"bytes":1193}},"failureBranch":"Unreadable/conflicting orientation or invalid thumbnail range produces a visible failure; it is not guessed from the chart.","next":"Read dates, decide whether to make a new display copy, and save an embedded thumbnail separately if it is needed."},{"id":"S-H02-MISSING","label":"Unknown timezone and absent thumbnail controls","inputs":[{"path":"/samples/photo-metadata/date-unknown.jpg","bytes":9413,"sha256":"e1b1b4c46dbe7c92e581378254e8d858b6dee62af1a159728678cb736a224861","actual":{"dates":{"status":"read","records":[{"id":"EXIF1:IFD0:0x0132:1","source":"JPEG APP1 EXIF 1, IFD0 0x132","kind":"modified","raw":"2020:01:02 12:00:00","subseconds":null,"offset":null,"localDateTime":"2020-01-02T12:00:00","utcIso":null,"valid":true,"warnings":[]},{"id":"EXIF1:EXIF:0x9003:1","source":"JPEG APP1 EXIF 1, EXIF 0x9003","kind":"capture","raw":"2020:01:02 10:20:30","subseconds":"123456789","offset":null,"localDateTime":"2020-01-02T10:20:30.123456789","utcIso":null,"valid":true,"warnings":[]},{"id":"EXIF1:EXIF:0x9004:1","source":"JPEG APP1 EXIF 1, EXIF 0x9004","kind":"digitized","raw":"2020:01:02 10:21:00","subseconds":null,"offset":null,"localDateTime":"2020-01-02T10:21:00","utcIso":null,"valid":true,"warnings":[]}],"conflicts":[],"warnings":[]},"orientation":{"encodedWidth":240,"encodedHeight":160,"tag":6,"outputWidth":160,"outputHeight":240},"thumbnail":{"status":"read","warnings":[],"images":[{"width":48,"height":32,"tiffOffset":240,"length":1193}]}}},{"path":"/samples/photo-metadata/thumbnail-absent.jpg","bytes":8238,"sha256":"e3d3506b3a76dccf79c2eab8c7f915f78c67bd29c7130ce40cd95faadce7fc33","actual":{"dates":{"status":"read","records":[{"id":"EXIF1:IFD0:0x0132:1","source":"JPEG APP1 EXIF 1, IFD0 0x132","kind":"modified","raw":"2020:01:02 12:00:00","subseconds":null,"offset":"+05:30","localDateTime":"2020-01-02T12:00:00","utcIso":"2020-01-02T06:30:00Z","valid":true,"warnings":[]},{"id":"EXIF1:EXIF:0x9003:1","source":"JPEG APP1 EXIF 1, EXIF 0x9003","kind":"capture","raw":"2020:01:02 10:20:30","subseconds":"123456789","offset":"+05:30","localDateTime":"2020-01-02T10:20:30.123456789","utcIso":"2020-01-02T04:50:30.123456789Z","valid":true,"warnings":[]},{"id":"EXIF1:EXIF:0x9004:1","source":"JPEG APP1 EXIF 1, EXIF 0x9004","kind":"digitized","raw":"2020:01:02 10:21:00","subseconds":null,"offset":"+05:30","localDateTime":"2020-01-02T10:21:00","utcIso":"2020-01-02T04:51:00Z","valid":true,"warnings":[]}],"conflicts":[],"warnings":[]},"orientation":{"encodedWidth":240,"encodedHeight":160,"tag":6,"outputWidth":160,"outputHeight":240},"thumbnail":{"status":"empty","warnings":[],"images":[]}}},{"path":"/samples/photo-metadata/date-none.jpg","bytes":9277,"sha256":"dba3ac8a0a3af6bbf622396f38a0aaeb3aad4f6af2faba338e611c2d1a797037","actual":{"dates":{"status":"empty","records":[],"conflicts":[],"warnings":[]},"orientation":{"encodedWidth":240,"encodedHeight":160,"tag":6,"outputWidth":160,"outputHeight":240},"thumbnail":{"status":"read","warnings":[],"images":[{"width":48,"height":32,"tiffOffset":104,"length":1193}]}}}],"source":"Defined variants of the same self-authored camera chart, not three independent photographs","expected":{"unknownTimezone":"Capture raw text and all subsecond digits retained; UTC instant unknown","absentThumbnail":"empty; no resized substitute","absentDates":"No supported embedded dates; a separate browser modification record may remain"},"failureBranch":"Missing stored data is distinct from malformed fields or unreadable offsets.","next":"Preserve unknowns and seek an intact original or independent provenance context rather than filling gaps from the browser clock."},{"id":"S-H02-DIAGNOSTIC","label":"Conflicting chronology and broken thumbnail reference","inputs":[{"path":"/samples/photo-metadata/date-conflict.jpg","bytes":9473,"sha256":"73264e068b30d1e096977811b182a4aaa0d7a6e259a1b4061a637011acb3fa2c","actual":{"dates":{"status":"partial","records":[{"id":"EXIF1:IFD0:0x0132:1","source":"JPEG APP1 EXIF 1, IFD0 0x132","kind":"modified","raw":"2020:01:02 12:00:00","subseconds":null,"offset":"+05:30","localDateTime":"2020-01-02T12:00:00","utcIso":"2020-01-02T06:30:00Z","valid":true,"warnings":[]},{"id":"EXIF1:EXIF:0x9003:1","source":"JPEG APP1 EXIF 1, EXIF 0x9003","kind":"capture","raw":"2020:01:02 10:20:30","subseconds":"123456789","offset":"+05:30","localDateTime":"2020-01-02T10:20:30.123456789","utcIso":"2020-01-02T04:50:30.123456789Z","valid":true,"warnings":[]},{"id":"EXIF1:EXIF:0x9004:1","source":"JPEG APP1 EXIF 1, EXIF 0x9004","kind":"digitized","raw":"2020:01:02 08:00:00","subseconds":null,"offset":"+05:30","localDateTime":"2020-01-02T08:00:00","utcIso":"2020-01-02T02:30:00Z","valid":true,"warnings":[]}],"conflicts":["JPEG APP1 EXIF 1, EXIF 0x9004 is earlier than JPEG APP1 EXIF 1, EXIF 0x9003 after their explicit UTC offsets are applied. No file dates were changed."],"warnings":[]},"orientation":{"encodedWidth":240,"encodedHeight":160,"tag":6,"outputWidth":160,"outputHeight":240},"thumbnail":{"status":"read","warnings":[],"images":[{"width":48,"height":32,"tiffOffset":300,"length":1193}]}}},{"path":"/samples/photo-metadata/thumbnail-broken.jpg","bytes":9473,"sha256":"084dbf530014adb1485c23a84c5256d5a2627b91e07f5b6c39232cd090cdd45f","actual":{"dates":{"status":"read","records":[{"id":"EXIF1:IFD0:0x0132:1","source":"JPEG APP1 EXIF 1, IFD0 0x132","kind":"modified","raw":"2020:01:02 12:00:00","subseconds":null,"offset":"+05:30","localDateTime":"2020-01-02T12:00:00","utcIso":"2020-01-02T06:30:00Z","valid":true,"warnings":[]},{"id":"EXIF1:EXIF:0x9003:1","source":"JPEG APP1 EXIF 1, EXIF 0x9003","kind":"capture","raw":"2020:01:02 10:20:30","subseconds":"123456789","offset":"+05:30","localDateTime":"2020-01-02T10:20:30.123456789","utcIso":"2020-01-02T04:50:30.123456789Z","valid":true,"warnings":[]},{"id":"EXIF1:EXIF:0x9004:1","source":"JPEG APP1 EXIF 1, EXIF 0x9004","kind":"digitized","raw":"2020:01:02 10:21:00","subseconds":null,"offset":"+05:30","localDateTime":"2020-01-02T10:21:00","utcIso":"2020-01-02T04:51:00Z","valid":true,"warnings":[]}],"conflicts":[],"warnings":[]},"orientation":{"encodedWidth":240,"encodedHeight":160,"tag":6,"outputWidth":160,"outputHeight":240},"thumbnail":{"status":"unreadable","warnings":["EXIF 1: thumbnail offset/length is outside its TIFF container or limit."],"images":[]}}}],"source":"Intentionally problematic variants generated from the project-authored chart","expected":{"dates":"partial; explicit-offset digitization precedes capture","thumbnail":"unreadable; out-of-range reference; no output"},"failureBranch":"No preferred date or replacement thumbnail is invented, and the source file is not changed.","next":"Export the warning context, stop using the failed component as evidence, and obtain an intact original if needed."}]}