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Expline in detaild about Webdynpro ? give Url plz(Usha)
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Answer Posted / ravi
Web Dynpro (WD) is a proprietary web application user interface technology developed by SAP AG and exists in a Java (Web Dynpro for Java, WDJ or WD4J) and an ABAP (Web Dynpro ABAP[1] , WDA) flavor.
WD follows an adapted MVC pattern and a model driven development approach ("minimize coding, maximize design") with a large number of dedicated hooks in generated code to place custom coding. It is intended for business applications that shall follow standardized UI principles, connect to backend systems and be scalable.Main advantages of Web Dynpro over other technologies
 typed access for design time checks, e.g. navigation links and messages are accessed via types instead of string keys like in JSF
 diverse services for backend access, like aRFC, JEE and Web Service data models
 integration with SAP Interactive Forms by Adobe, which are interactive PDF forms, during design (same IDE) and run time (data sharing)
 integration with business process management and business rules management (since NetWeaver CE 7.1 EHP 1)
 designed to support development big scale applications by adding multiple grouping layers on top of Java packages (DCs, SCs, products)
 runs on different clients e.g. web browser, mobile device, widget engine
 comes with a big collection of UI elements providing a wealth of functionality and only have to be configured but not programmed
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