摘要: Using formal specifications to represent software components facilitates tire determination of reusability because they more precisely characterize the functionality software, and well-defined syntax makes processing amenable automation. This paper presents an approach, based on methods, modification reusable components. From a two-tiered hierarchy components, existing that are general than query specification retrieved from hierarchy. The for component is compared determine what changes need be applied corresponding program in order make it satisfy specification. also describes approach assisting gives example demonstrate its use. >