gentoo-overlay/dev-tex/dot2texi/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
<herd>tex</herd>
<use>
  <flag name='pgf'>Enable support for <pkg>dev-tex/pgf</pkg> (The TeX Portable
    Graphic Format)</flag>
  <flag name='pstricks'>Enable pstricks support</flag>
</use>
</pkgmetadata>