gentoo-overlay/app-text/webgen/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
  <maintainer type="project">
    <email>ruby@gentoo.org</email>
    <name>Gentoo Ruby Project</name>
  </maintainer>
  <use>
    <flag name="builder">Enable programmatic HTML/XML generation</flag>
    <flag name="highlight">Enable syntax highlighting for certain plugins</flag>
    <flag name="markdown">Markdown support</flag>
  </use>
</pkgmetadata>