docs: def parse_yaml(self, y):
          '''Parse a YAML specification of a target component into this
          object.
  
          '''
          self.component_id = y['componentId']
          self.instance_name = y['instanceName']
          if RTS_EXT_NS_YAML + 'properties' in y:
              for p in y.get(RTS_EXT_NS_YAML + 'properties'):
                  if 'value' in p:
                      value = p['value']
                  else:
                      value = None
                  self._properties[p['name']] = value
          return self