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

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
  <herd>sound</herd>
  <longdescription>MusicBrainz Picard is a cross-platform MusicBrainz tag editor
  written in Python. Picard Tagger is intended to be the next generation of
  tagger for MusicBrainz, with a focus on album oriented tagging as opposed to
  track based tagging and cross platform compatibility.</longdescription>
<use>
  <flag name='acoustid'>Use media-libs/chromaprint for acoustic fingerprinting</flag>
</use>
</pkgmetadata>