code: def start_output (self):
          
          super(SitemapXmlLogger, self).start_output()
          self.xml_start_output()
          attrs = {u"xmlns": u"http://www.sitemaps.org/schemas/sitemap/0.9"}
          self.xml_starttag(u'urlset', attrs)
          self.flush()
docs: Write start of checking info as xml comment.