application/vnd.openxmlformats-officedocument.custom-properties+xml
Media Type
- Code
- application/vnd.openxmlformats-officedocument.custom-properties+xml
- Top-Level Type
- application
- Registration Template
- https://www.iana.org/assignments/media-types/application/vnd.openxmlformats-officedocument.custom-properties+xml