gentoo-overlay/media-sound/dir2ogg/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
  <herd>sound</herd>
  <use>
    <flag name="mac">Add support for decoding Monkey's Audio files</flag>
    <flag name="wma">Add support for wma files through mplayer</flag>
  </use>
</pkgmetadata>