I downloaded the HelloWorld Extension for Tridion 2011 code to get started with it and everything is working, but I was wondering where I can find more information about the options in the configuration file.
For instance is there a Schema available for the UI extension configuration, in particular for the cfg: (http://www.sdltridion.com/2009/GUI/Configuration), ext: (http://www.sdltridion.com/2009/GUI/extensions) and cmenu: (http://www.sdltridion.com/2009/GUI/extensions/ContextMenu) namespaces?