gentoo-overlay/media-libs/faad2/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
  <herd>sound</herd>
  <longdescription>The fastest ISO AAC audio decoder available, correctly decodes all MPEG-4 and MPEG-2 MAIN, LOW, LTP, LD and ER object type AAC files</longdescription>
  <use>
    <flag name="digitalradio">Digital Radio Mondiale (warning: disables other decoders)</flag>
  </use>
</pkgmetadata>