Web Dynpro (WD) is a proprietary web application technology developed by SAP SE that focuses on the development of server-side business applications. One of its main design features is that the user interface is defined in an entirely declarative manner. Web Dynpro applications can be developed using either a Java (Web Dynpro for Java, WDJ or WD4J) or ABAP (Web Dynpro ABAP, WDA or WD4A) flavor. The earliest version of Web Dyn in 2003 and was based on Java. This variant was released some 18 months before the ABAP variant. The Java variant of Web Dynpro experienced limited commercial success, and as of 2010, has been placed in maintenance. This means that the existing product is supported to the extent that any bugs are fixed; however, no new functionality will be added. SAPs development effort is now focused on the ABAP variant of Web Dynpro.