| Industrialized tendency in software trade leads to generation of software component. It's a dreaming target which software trade has chased for several years that composing parts of software to construct software system as it being in hardware system. It will greatly enhance production efficiency and decrease plenty of repetitive works if we can make the most of existing software component combining system's matter of fact, especially to many developing of application software. We may say that software component technology's appearing is an innovation to traditional software developing process.Software component is a constituent element identified and measured up to certain specification in software system. It is similar to detail of traditional industry. In common words, component could be requirements, design, code, testing cases, documents or other production in software developing process. Then, in specialized words, it commonly refers to software system's program modules providing a set of regular interface for out-surroundings, measuring certain standard and substitutable. It refers to the latter in general occasion. Software component is a fundamental unit of software reusability. Software component technology makes software developers use others' working outcome in application developing and it forms premise for software estate's being on a large amount of specialization partition and cooperation.Thinking of component is sort of advancing software design thinking. This thesis will expound component technology's fundamental theory and significance in detail. And it will give out an actually developed engineering system based on thinking of component. The article's investigation aim is to provide a new way and technology for software developers and managers, which will make great progress on technology of software trade.
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