The concept of Enterprise Service Architecture is based on providing business functionality using Web services, located on an independent layer of the user interfaces and based on. an abstract layer between these UIs and the business applications providing the different services. Web services are services made available from a business's Web server for Web users or other Web-connected programs and applications. These services typically include a combination of data and programming.
Web services are very varied and range from business intelligence reports to customer relationship management, news, and tracking services. Users can access some Web services through a peer-to-peer arrangement rather than by going to a central server. Some services can communicate with other services, and this exchange of procedures and data is generally enabled by a class of software known as middleware. Besides the standardization and wide availability to users and businesses of the Internet itself, Web services are also increasingly enabled by the use of XML (eXtensible Markup Language) as a means of standardizing data formats and exchanging data. XML is the foundation for the Web Services Description Language (WSDL).
A number of new products have emerged that enable software developers to create or modify existing applications that can be "published" (made known and potentially accessible) as Web services. Providers of Web services are generally known as application service providers. Under this umbrella of ESA principles, SAP designed and built the NetWeaver platform. In other words, NetWeaver constitutes SAP's new services-oriented architecture. The evolution of the architectures supporting integrated business applications, ERP, and how NetWeaver now supports the SAP Business Solutions.
Evolution to Enterprise Service Architecture
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Sap Basis Tutorial
Sap: From Sap R/3 To Sap Netweaver
The Architecture Of The Sap Web Application Server
Sap Netweaver: An Overview
Using Sap Systems
Upgrading To Sap R/3 Enterprise: The First Step Into Sap Netweaver
The Change And Transport System
Development Options With Sap Solutions: Abap Engine
User Management And Security In Sap Environments
Web Application Server System Management
Performance And Troubleshooting With Sap Solutions
Sap For It Managers: Implementation, Planning, Operation, And Support Of Sap Systems
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