I’m unfortunately not aware.
What I do know is that D-Bus (and not “DBus”) apparently doesn’t work with MIME types directly. I may have been misinformed here - but this is some information I have received.
Essentially, the data sent cannot be assigned a type or format.
On the web, all data sent by a server has a MIME type (“text/html”, “image/png”, “video/mp4”).
Android’s system for inter-process (“running program”) communication, intents, does include.
…Even Windows does, with its whatever complicated APIs.
D-Bus doesn’t, so Tuxes too, don’t. …Yet.
D-Bus is apparently also not secure enough. Probably not as bad as X11, but not good enough.
So far, KDE and GNOME have had their own " wrapper" systems to allow using D-Bus through a layer of their code to cover little inconveniences like this.
