1. A method of converting a complex two dimensional graphical hierarchy of signal values for more convenient processing and/or storage, said complex two dimensional graphical hierarchy being in the form of a tree hierarchy, said method comprising: executing one or more processors of one or more computing devices comprising: accessing from memory signal values representing an unlabeled complex two dimensional graphical hierarchy; transforming said signal values representing said unlabeled complex two dimensional graphical hierarchy to signal values representing a labeled complex two dimensional graphical hierarchy, said unlabeled complex two dimensional graphical hierarchy and labeled complex two dimensional graphical hierarchy being elementary equivalents; and storing said signal values representing said labeled complex two dimensional graphical hierarchy.