gentoo-overlay/dev-util/itstool/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
<herd>gnome</herd>
<longdescription lang="en">ITS Tool allows you to translate your XML documents
  with gettext PO files, using rules from the W3C Internationalization Tag Set
  (ITS) to determine what to translate and how to separate it into PO file
  messages.
</longdescription>
</pkgmetadata>