20 ;;Quote: need to use named constants instead of enumerations if separate definition from implementation; otherwise need to recompile everything

21 ;;Quote: if enumerations define array bounds, then the size of an array depends on the enumeration's definition

22 ;;Quote: an enumeration not only specifies names but also their ordinal positions; creates hidden information and dependencies

22 ;;Quote: declare classes for enumerations and enumeration constants, with objects for enumeration values