So, here's the example scenario: Someone writes an extension for
writer which adds a file format importer and that gets
packaged into Fedora. Is there a way to then register the extra
mime-type that writer now supports if, and only if, that extension is
This is supposed to also work the other way: with the extension NOT
installed an user click on a file of that type and PackageKit pop-up,
ask about installing the extension, do its job, the extension is
installed and the file successfully opened?