docs: def qdc(self):
          '''Return the qdc tag for the term
          '''
          start_tag = ''.join(('<', self.get_term_display().lower(), ' q="',
              self.qualifier, '">',)) if self.qualifier else ''.join(('<', self.get_term_display().lower(), '>', ))
          qdc = ''.join((start_tag, saxutils.escape(self.content), '</', self.get_term_display().lower(), '>',))
          return mark_safe(qdc)