Clone in a terminal:
birdfont.appdata.xml
<?xml version="1.0" encoding="UTF-8"?>
<component>
	<id>org.birdfont.birdfont</id>
	<launchable type="desktop-id">birdfont.desktop</launchable>
	<metadata_license>CC0-1.0</metadata_license>
	<project_license>GPL-3.0+</project_license>
	<name>birdfont</name>
	<summary>Font editor</summary>
	<description>
		<p>
			BirdFont is a font editor which can generate fonts in TTF, 
			EOT and SVG format.
		</p>
	</description>
	<url type="homepage">https://birdfont.org/</url>
	<url type="donation">https://birdfont.org/</url>
	<url type="bugtracker">https://birdfont.org/bugtracker/my_view_page.php</url>
	<releases>
		<release version="2.19.4" date="2017-08-17" />
		<release version="2.19.3" date="2017-08-16" />
		<release version="2.19.0" date="2017-06-30" />
	</releases>
	<screenshots>
		<screenshot>
		<caption>Birdfont on Linux</caption>
		<image type="source" width="1280" height="800">https://birdfont.org/images/birdfont_font_editor.png</image>
		</screenshot>
	</screenshots>
	<provides>
		<binary>birdfont</binary>
	</provides>
	<update_contact>johan.mattsson.m@gmail.com</update_contact>
	<developer_name>Johan Mattsson</developer_name>
</component>

Contact

Email: johan.mattsson.m@gmail.com
Mastodon: typo.social/@birdfont
GitHub: johanmattssonm
LinkedIn: johan-mattsson-2ab324112