(registered 2026-08-10, last updated 2026-08-10)

Media type name: application

Media subtype name: vnd.ootmm.patch+zip

Required parameters: N/A

Optional parameters: N/A

Encoding considerations: binary

Security considerations: The security issues associated with this type have not been assessed.

Interoperability considerations: There are no specific challenges regarding interoperability for this format.

OoTMM patches are ZIP files containing JSON data (encoded at UTF-8 with no BOM) and byte-addressed binary blobs, none of which is expected to suffer from any interoperability challenge on any reasonably modern system.

Published specification: There is no published standard or specification for this format.

Applications which use this media: This format is used exclusively to store patch files for the OoTMM project (used on the web generator as well as the desktop version).

See the following for more information:

https://ootmm.com
https://github.com/OoTMM/OoTMM

Fragment identifier considerations: This media type does not have any support or specific meaning attached to fragment identifiers.

Restrictions on usage: This media type is intended for limited use, emitted and consumed by the OoTMM project (generator & tools).

Additional information:

1. Deprecated alias names for this type: N/A
2. Magic number(s): N/A
3. File extension(s): .ootmm
4. Macintosh file type code: N/A
5. Object Identifiers: N/A

Person to contact for further information:

1. Name: Maxime Bacoux
2. Email: max&bacoux.com

Intended usage: LIMITED USE

This media type is intended for limited use, emitted and consumed by the OoTMM project (generator & tools).

It is not expected to be used or supported in any form by any other project, application or tool.

Author/Change controller: N/A