Hi all, thank you very much for your precious feedback. Definitely, the `chemical` top-level media type has its place. If there is energy, I think that it would be neat to register it to the IANA. From Debian's side we can show the continuous use in the packages that produce it (web servers, etc) and the packages that consume it (mailcap, xdg-open, file, etc.). I do not know for the Mac and Windows worlds. Have a nice day, Charles