Define the XML stucture 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 Image icon file name to display Help page to be invoked Adapter class to invoke 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