Xwiki and plugins

Dear Sir! I am not sure that I am sending this email to right place, but I guess it is a start. I have few questions around xwiki which I hope you can answer me or that you will redirect to the right person to answer. The thing is that I want to use plugins which are included in xwiki. On this page "http://www.xwiki.org/xwiki/bin/view/UserGuide/Plugins" you want us to "copy its JAR (Plugins are bundled as JARs) into your XWiki installation: drop it in XWiki WAR's WEB-INF/lib directory. " But when I go to "http://svn.forge.objectweb.org/cgi-bin/viewcvs.cgi/xwiki/xwiki/trunk/core/src/main/java/com/xpn/xwiki/plugin/charts/" to download, there aren't any jar files to download. Does it mean that I have to download the java files, compile them and create jar files before I can use them on WEB-INF folder? I hope you can help me with this question. Thank you. -- Yours sincerely Anne Louisa Croos Database Developer IT-Department / open archaeology Museum of Culture History University of Oslo Tlf: +47 22 85 96 52