gentoo-overlay/sci-visualization/g3data/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
  <herd>sci</herd>
  <longdescription>
  g3data is used for extracting data from graphs. In publications graphs are
  often included, but the actual data is not. g3data makes the extraction
  process much easier.
</longdescription>
</pkgmetadata>