This file provides ant tasks that show how to obfuscate the yFiles classes before they can be deployed as a part of an applet or application. The ant-based obfuscation will be performed by the freely available obfuscator yGuard. (http://www.yworks.com/products/yguard). As application which is based on yFiles classes we choose the yFiles demo demo.view.hierarchy.HierarchyDemo. The deployment steps of this application are divided into the ant tasks each of which can be initiated by giving its name on the commandline. compile - compiles all application specific class contained in the demo.* packages. jar - puts all application specific class files and resources into the application jar application.jar. Note that the yFiles classes are not contained in this jar. They still reside in y.jar. obfuscate - obfuscates y.jar and adjusts application.jar accordingly. This obfuscation task takes as input the yFiles jar file y.jar and the application jar file application.jar. The output of the obfuscation task are the obfuscated versions yObf.jar and applicationObf.jar of these jar files. The rules in the obfuscation task state that all classes and property files contained in the packages y.* (y.jar) will be completely obfuscated. The names of the classes in the demo.* packages (application.jar) will be not be obfuscated. Only the dependencies to the obfuscated entities in y.jar will be adjusted accordingly. run - Executes the obfuscated application, to demonstrate that everything still works as expected. show - opens a small browser that shows the name mapping performed by yGuard.