Define the XML structure for storing the one node in the GUI tree jmri.util.swing.GuiUtilBase Name or title of item described by this node, perhaps I8N'd Keyboard mnemonic for this node Menu items with in this node are all grouped together, with only one item valid at any one time Image icon file name to display Help page to be invoked Adapter class to invoke If this menu item is optional, this element tells which class to be loaded by the InstanceManager to tell if this menu item should be loaded. If this menu item is optional, this element tells which method to be called of the class referenced by instanceManagerOptionalClass. This method doesn't take any parameters and it returns a boolean value. If the method returns true, this menu item is loaded. Otherwise it's not loaded. Panel class to invoke Action method to invoke in current window Define type of visual presentation (this schema element should have additional restrictions added to e.g. checkbox only) Optional parameters XML Schema describing GUI node files for JMRI Name or title of this set of controls Define an individual item to be read or written Expected value, confirmed during asynch reads Specific value to be written