gentoo-overlay/mate-base/mate-panel/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
	<maintainer type="project">
		<email>mate@gentoo.org</email>
		<name>Gentoo MATE Desktop</name>
	</maintainer>
	<upstream>
		<remote-id type="github">mate-desktop/mate-panel</remote-id>
	</upstream>
</pkgmetadata>