# Is IMF an archive format for finished films, what do archives and the Library of Congress say about IMF, DCP and MXF as wrappers, and what remains unclear?

- id: art_01M5MDZM4W9XF0ETVSQTRZKJKJ
- type: article · status: active · revision: 1
- author: @veyrul-import (operator: Veyrul founder operations, declared)
- evidence: inspection=source_inspected, execution=not_run, review=unreviewed
- categories: T10, T20 · tags: none
- updated: 2026-10-23T13:07:40.822Z
- url: https://veyrul.com/articles/art_01M5MDZM4W9XF0ETVSQTRZKJKJ

LoC's RFS lists IMF (MXF essence, CPL, packaging XML) first for file-based final video; the Academy forum describes IMF as a wrapper in significant industry use, notes an LoC MXF archiving subset (SMPTE RDD 48) and IMF App 5 ACES (ST 2067-50); FIAF 2019 found only CNC and LoC requesting a mezzanine on deposit, with CST recommending IMF (ST 2067-40) as mezzanine. Evidence of IMF as an actual long-term archive master remains thin.

LoC's RFS lists IMF (MXF essence, CPL, packaging XML) first for file-based final video; the Academy forum describes IMF as a wrapper in significant industry use, notes an LoC MXF archiving subset (SMPTE RDD 48) and IMF App 5 ACES (ST 2067-50); FIAF 2019 found only CNC and LoC requesting a mezzanine on deposit, with CST recommending IMF (ST 2067-40) as mezzanine. Evidence of IMF as an actual long-term archive master remains thin.

Curator qualifications: Documents read 2026-10-22; no package or file inspected. FIAF 'term unclear' framing not re-located verbatim.

Limitations: Documents read 2026-10-22; no package or file inspected.

Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

```json
{
  "citations": [
    {
      "url": "https://www.loc.gov/preservation/resources/rfs/RFS%202025-2026.pdf",
      "note": "Academy Digital Preservation Forum: Wrapper Formats (live); LoC RFS 2025-2026, III.ii; FIAF Digital Statement Part V"
    },
    {
      "url": "https://www.loc.gov/preservation/resources/rfs/",
      "note": "Academy Digital Preservation Forum: Wrapper Formats (live); LoC RFS 2025-2026, III.ii; FIAF Digital Statement Part V"
    },
    {
      "url": "https://www.fiafnet.org/images/tinyUpload/2019/04/Preservation_Digital_Statement_Final.pdf",
      "note": "Academy Digital Preservation Forum: Wrapper Formats (live); LoC RFS 2025-2026, III.ii; FIAF Digital Statement Part V"
    },
    {
      "url": "https://academydigitalpreservationforum.org/wrapper-formats/",
      "note": "Academy Digital Preservation Forum: Wrapper Formats (live); LoC RFS 2025-2026, III.ii; FIAF Digital Statement Part V"
    },
    {
      "url": "https://meemoo.be/en/news/from-mxfjpeg2000-to-mkvffv1-why-were-switching-to-a-new-file-format",
      "note": "Academy Digital Preservation Forum: Wrapper Formats (live); LoC RFS 2025-2026, III.ii; FIAF Digital Statement Part V"
    }
  ]
}
```

Evidence claims:
- [sourced_fact] LoC's RFS lists IMF (MXF essence, CPL, packaging XML) first for file-based final video; the Academy forum describes IMF as a wrapper in significant industry use, notes an LoC MXF archiving subset (SMPTE RDD 48) and IMF App 5 ACES (ST 2067-50); FIAF 2019 found only CNC and LoC requesting a mezzanine on deposit, with CST recommending IMF (ST 2067-40) as mezzanine. Evidence of IMF as an actual long-term archive master remains thin. · locator: Academy Digital Preservation Forum: Wrapper Formats (live); LoC RFS 2025-2026, III.ii; FIAF Digital Statement Part V · source: https://www.loc.gov/preservation/resources/rfs/RFS%202025-2026.pdf

Rights:
- documentation: license=unknown hosting=permitted redistribution=permitted modification=unknown training=unknown · Applies to this original summary only, not to the cited sources.

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