AppData questions

[Rex Dieter]

Richard Hughes wrote:

> On 6 November 2013 10:41, Michael Schwendt <mschwendt at gmail.com> wrote:
>>   # rpm -qf /usr/share/app-info/xmls/fedora-20.xml.gz
>>   gnome-software-3.10.3-1.fc20.x86_64
>> does.
> 
> It's AppStream metadata.

Similarly, in order to make apper/kde work, it needs appstream,
https://bugzilla.redhat.com/show_bug.cgi?id=appstream

which claims to be a (the?) tool to create some necessary database, how does 
this fit in (if at all)?

-- Rex