Web Dynpro forms part of the SAP Web applicaton server which is based on open standards. Before explaining the concept and main features of WebDynpro, it is worth to take a look at SAP Web application server. The SAP Web AS provides an enterprise scaled, platform independent application server with J2EE and ABAP languages built in. The Web AS provides a seamless integration of SAP components with a database independent persistence framework. Within the WEB AS, the Web Dynpro acts as the basis for professional User Interface development.

The Web Dynpro can be accessed using the Web Dynpro Explorer which displays the default view of the logical structure of the entire Web Dynpro application. The nodes and subnodes created by the Web Dynpro generator act as the starting point for the creation of new application elements. The Web Dynpro explorer consists of many tools and submenus which can be user for different user interface development purposes. Some of the key SAP WebDynpro tools are discussed below:

1. Data Modeler - The data modeler is a graphical tool used for central development tasks such as creating a view, controller definition, declaring a model to a component. creating a data link etc.

2. Navigation modeler - The navigation modeler is a graphical Web Dynpro tool within the SAP Netweaver Development Studio. The navigation modeler is very helpful in designing and implementing user interface elements, application entities, views and navigation.

3. View Designer - The View Designer provides GUI support during the implementation of a user interface layout of a Web Dynpro application. One important point to note is that the logical element of the interface layout is the View.

4. Controller / Context Editor - As the name suggests, the controller / context editor are used to create controller context trees and defintion of the data flow between two or more Web Dynpro entities. The controller context editor can be used to create context structures for different controller types.

5. Message Editor - The message editor within WebDynpro helps in creating and editing messages that need to be displayed on screen. Similarly, texts that need to be displayed at runtime can be created using the message editor in the SAP Netweaver Developer Studio.

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