docs: def parse_xml_node(self, node):
          '''Parse an xml.dom Node object representing a target component into
          this object.
  
          '''
          self.component_id = node.getAttributeNS(RTS_NS, 'componentId')
          self.instance_name = node.getAttributeNS(RTS_NS, 'instanceName')
          for c in node.getElementsByTagNameNS(RTS_EXT_NS, 'Properties'):
              name, value = parse_properties_xml(c)
              self._properties[name] = value
          return self