docs: def parse_fixed(self, node):
          """
          Parses <Fixed>
  
          @param node: Node containing the <Fixed> element
          @type node: xml.etree.Element
          """
  
          try:
              parameter = node.lattrib['parameter']
          except:
              self.raise_error('<Fixed> must specify a parameter to be fixed.')
  
          try:
              value = node.lattrib['value']
          except:
              self.raise_error("Fixed parameter '{0}'must specify a value.", parameter)
  
          description = node.lattrib.get('description', '')
          
          self.current_component_type.add_parameter(Fixed(parameter, value, description))