code: def value_type(self):
          
          redundantprefix = "value_is_"
          vtype = self._attribute.get("description_format")
  
          if vtype and vtype.startswith(redundantprefix):
              return vtype[len(redundantprefix):]
          else:
              return vtype
docs: The attribute's type, note that this is the type of the attribute's
          value and not its affect on the item (i.e. negative or positive). See
          'type' for that.