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A service-oriented architecture (SOA) is an architectural pattern in computer software design in which application components provide services to other components via a communications protocol, typically over a network. The principles of service-orientation are independent of any vendor, product or technology.〔(Chapter 1: Service Oriented Architecture (SOA) ). Msdn.microsoft.com. Retrieved on May 30, 2014.〕 A service is a self-contained unit of functionality, such as retrieving an online bank statement. By that definition, a service is a discretely invokable operation. However, in the Web Services Definition Language (WSDL), a service is an interface definition that may list several discrete services/operations. And elsewhere, the term service is used for a component that is encapsulated behind an interface. This widespread ambiguity is reflected in what follows. Services can be combined to provide the functionality of a large software application. SOA makes it easier for software components on computers connected over a network to cooperate. Every computer can run any number of services, and each service is built in a way that ensures that the service can exchange information with any other service in the network without human interaction and without the need to make changes to the underlying program itself. == Definitions == The OASIS group〔(SOA Reference Model definition )〕 and the Open Group〔(【引用サイトリンク】title=Service Oriented Architecture : What Is SOA? )〕 have both created formal definitions. OASIS defines SOA as:
The Open Group's definition is:
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Service-oriented architecture」の詳細全文を読む スポンサード リンク
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