code: def log_url (self, url_data):
          
          node = self.get_node(url_data)
          if node:
              self.xml_starttag(u'node', attrs={u"name": u"%d" % node["id"]})
              self.xml_tag(u"label", node["label"])
              if self.has_part("realurl"):
                  self.xml_tag(u"url", node["url"])
              self.xml_starttag(u"data")
              if node["dltime"] >= 0 and self.has_part("dltime"):
                  self.xml_tag(u"dltime", u"%f" % node["dltime"])
              if node["size"] >= 0 and self.has_part("dlsize"):
                  self.xml_tag(u"size", u"%d" % node["size"])
              if node["checktime"] and self.has_part("checktime"):
                  self.xml_tag(u"checktime", u"%f" % node["checktime"])
              if self.has_part("extern"):
                  self.xml_tag(u"extern", u"%d" % node["extern"])
              self.xml_endtag(u"data")
              self.xml_endtag(u"node")
docs: Write one node and all possible edges.