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Each Track File contains a specific essence corresponding to a single aspect of the presentation. Track Files are both organized and limited by parameters such as resolution, color space, frame rate, audio sound field, etc. Track Files of disparate parameters may not be mixed in a Composition. Track Files use a constrained version of the MXF OP1a format [[Material Exchange Format]]<ref name=":1" />
The Composition Playlist is an [[XML]] document.<ref>{{Cite journal |date=May 2020 |title=ST 2067-3:2020 - SMPTE Standard - Interoperable Master Format — Composition Playlist |url=https://ieeexplore.ieee.org/document/9097510 |journal=St 2067-3:2020 |pages=1–35 |doi=10.5594/SMPTE.ST2067-3.2020|isbn=978-1-68303-214-4 |doi-access=free }}</ref> It assembles the Track Files<ref>{{Cite journal |date=May 2020 |title=ST 2067-5:2020 - SMPTE Standard - Interoperable Master Format — Essence Component |url=https://ieeexplore.ieee.org/document/9099734 |journal=St 2067-5:2020 |pages=1–15 |doi=10.5594/SMPTE.ST2067-5.2020|isbn=978-1-68303-213-7 |doi-access=free }}</ref> onto virtual tracks that are synchronized onto a timeline. It also contains metadata associated with that timeline.The combination of a Composition Playlist and the Track Files it references is called a Composition.
Each Composition represents a different version of an audio-visual work. Separating the Composition Playlist from the Track Files allows reuse of Track Files across multiple Compositions, as shown in the reuse example diagram. [[File:IMF Track File Re-use Example.svg|alt=IMF can re-use Track Files to minimize resource usage for versions of audio-viual works.|thumb|IMF Track File Reuse]]
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* Video up to 8192x6224 rasters, lossy and lossless compression, high-dynamic range, wide color gamut and stereoscopic 3D,<ref name=":2" />
* 24-bit 48 kHz channel-based sound, arranged in arbitrary configurations
* Immersive Audio Bitstream (IAB) immersive sound<ref>{{Cite journal |date=June 2019 |title=ST 2098-2:2019 - SMPTE Standard - Immersive Audio Bitstream Specification |url=https://ieeexplore.ieee.org/document/8752533 |journal=St 2098-2:2019 |pages=1–54 |doi=10.5594/SMPTE.ST2098-2.2019|isbn=978-1-68303-178-9 |doi-access=free }}</ref>
* Subtitles and captions that conform to the TTML Profiles for Internet Media Subtitles and Captions 1.1 (IMSC 1.1) W3C Recommendation<ref>{{Cite web |title=TTML Profiles for Internet Media Subtitles and Captions 1.1 |url=https://www.w3.org/TR/ttml-imsc1.1/Overview.html |access-date=2022-03-04 |website=www.w3.org}}</ref>
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