XRC file is a XML file with all of its elements in the http://www.wxwidgets.org/wxxrc namespace. For backward compatibility, http://www.wxwindows.org/wxxrc namespace is accepted as well (and treated as identical to http://www.wxwidgets.org/wxxrc), but it shouldn't be used in new XRC files.XRC file contains definitions for one or more objects -- typically windows. The objects may themselves contain child objects.