games-fps/quake3-demo/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
<herd>games</herd>
<use>
	<flag name='dedicated'>install only as a dedicated game serer</flag>
</use>
</pkgmetadata>