* plug-ins, which contain optional technology that can be used across multiple applications.
The core constraints are specified in SMPTE ST 2067-2 (Core Constraints).<ref name=":1">{{Cite journal |date=May 2020 |title=ST 2067-2:2020 - SMPTE Standard - Interoperable Master Format — Core Constraints |url=https://ieeexplore.ieee.org/document/9097478 |archive-url=https://web.archive.org/web/20201025194936/https://ieeexplore.ieee.org/document/9097478 |url-status=dead |archive-date=25 October 2020 |journal=St 2067-2:2020 |pages=1–43 |doi=10.5594/SMPTE.ST2067-2.2020|isbn=978-1-68303-211-3 |doi-access=free }}{{dead link|date=July 2024|bot=medic}}{{cbignore|bot=medic}}</ref> An example of an application is Application #2E, which is specified in SMPTE ST 2067-21<ref name=":2">{{Cite journal |date=May 2020 |title=ST 2067-21:2020 - SMPTE Standard - Interoperable Master Format — Application #2E |url=https://ieeexplore.ieee.org/document/9097487 |archive-url=https://web.archive.org/web/20200929152305/https://ieeexplore.ieee.org/document/9097487 |url-status=dead |archive-date=29 September 2020 |journal=St 2067-21:2021 |pages=1–34 |doi=10.5594/SMPTE.ST2067-21.2020|isbn=978-1-68303-212-0 |doi-access=free }}{{dead link|date=July 2024|bot=medic}}{{cbignore|bot=medic}}</ref> and targets studio masters. One of the plugins is the Immersive Audio Bitstream Level 0 Plug-in, which is specified in SMPTE ST 2067-201<ref>{{Cite book |date=January 2021 |title=ST 2067-201:2021 - SMPTE Standard - Immersive Audio Bitstream Level 0 Plug-in |url=https://ieeexplore.ieee.org/document/9343937 |archive-url=https://web.archive.org/web/20210203090109/https://ieeexplore.ieee.org/document/9343937/ |url-status=dead |archive-date=3 February 2021 |journal=St 2067-201:2021 |pages=1–14 |doi=10.5594/SMPTE.ST2067-201.2021|isbn=978-1-68303-238-0 }}</ref> and adds support for immersive sound.
