GNOME Software developer Richard Hughes recently e-mailed the Fedora developers mailing requesting Fedora package maintainers to update their AppData files to include age ratings using OARS.

“The latest feature we want to support upstream is age classifications
for games. I’ve asked all the maintainers listed in the various
upstream AppData files (using the update contact email address) to
generate some OARS metadata and add it to the .appdata.xml file, but
of course some AppData files do not have any contact details and so
they got missed. I’m including this email here as I know some AppData
files are included in the various downstream spec files by Fedora
packagers. Generating metadata is really as simple as visiting then answering about 20 questions with
multiple choice answers, then pasting the output inside the
<component> tag.

Using the <content_rating> tag means we can show games with an
appropriate age rating depending on the country of the end user. If
you have any comments about the questions on the OARS page please do
let me know. Before the pitchforks start being sharpened it’s an
anti-goal of the whole system to in any way filter the output of
search results dependent on age. The provided metadata is only used in
an informational way.”

If your package ships an AppData file, please consider updating it. If you have any queries about the addition or OARS, please discuss it on the Fedora developers mailing list.