#ifndef CHILD
#define CHILD(x)
#endif
#ifndef START
#define START(x)
#endif
#ifndef CHARACTERS
#define CHARACTERS(x)
#endif
#ifndef END
#define END(x)
#endif
#ifndef FACET
#define FACET(name, a, b, c, d)
#endif
#ifndef CLASS
#define CLASS Error_CLASS_Must_Be_Defined
#endif