Abstract: At present, componentbased software development model is widely accepted by software developers, because this model can improve software quality, reduce software development and maintenance costs. Component description is the basis of component retrieval and reuse. This paper presents a featurebased, multidomainoriented description of the components, including five parts: functional components, applications, component relations, component quality and other. Componentbased software development model in the largescale promotion of the circumstances, the component currency will become the key links of the component industrialization. Featurebased description method of components solves semantic understanding difficulty in the course of the component currency, promotes the domain component standardization promotion.

Key words: software component, component library, feature, domain, component description, component currency