gentoo-overlay/media-libs/libart_lgpl/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
  <maintainer type="project">
    <email>gnome@gentoo.org</email>
    <name>Gentoo GNOME Desktop</name>
  </maintainer>
  <upstream>
    <remote-id type="gnome-gitlab">Archive/libart_lgpl</remote-id>
  </upstream>
</pkgmetadata>