SEMINAR ON SERVICE ORIENTED ARCHITECTURE : SOA is a model to link business and IT resources (mainly organizations, applications and data) to the request to obtain the desired results for service consumers (which may be end users or other services). Service-orientation describes an architecture that uses loosely coupled to support the requirements of business processes and users. Resources on a network in an SOA environment are made available to independent services that can be accessed without knowledge of their implementation platform underneath. These concepts can be applied to companies, software and other systems of producers / consumers.
The main drivers for SOA adoption are links to information resources and promote reuse. we believe that enterprise SOA can help businesses respond more quickly and effectively to changing market conditions. This style of architecture promotes reuse at the macro (service) rather than the micro level (objects) level.
The following principles define the ground rules for development, maintenance and use of SOA
• Re-use components, modularity, composability, componentization, and interoperability
• Meeting standards (both common and specific to industry)
• Services identification and categorization, provisioning and delivery of surveillance and monitoring.
An obvious and common challenge faced by the service metadata management. Another challenge is to provide a reasonable degree of certainty. Interoperability is another important aspect of SOA implementations.

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