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+@node Ctype
+@chapter Character Type Macros and Functions (@file{ctype.h})
+This chapter groups macros (which are also available as subroutines)
+to classify characters into several categories (alphabetic,
+numeric, control characters, whitespace, and so on), or to perform
+simple character mappings.
+
+The header file @file{ctype.h} defines the macros.
+@menu 
+* isalnum::   Alphanumeric character predicate
+* isalpha::   Alphabetic character predicate
+* isascii::   ASCII character predicate
+* iscntrl::   Control character predicate
+* isdigit::   Decimal digit predicate
+* islower::   Lower-case character predicate
+* isprint::   Printable character predicates (isprint, isgraph)
+* ispunct::   Punctuation character predicate
+* isspace::   Whitespace character predicate
+* isupper::   Uppercase character predicate
+* isxdigit::  Hexadecimal digit predicate
+* toascii::   Force integers to ASCII range
+* tolower::   Translate characters to lower case
+* toupper::   Translate characters to upper case
+@end menu
+
+@page
+@include ctype/isalnum.def
+
+@page
+@include ctype/isalpha.def
+
+@page
+@include ctype/isascii.def
+
+@page
+@include ctype/iscntrl.def
+
+@page
+@include ctype/isdigit.def
+
+@page
+@include ctype/islower.def
+
+@page
+@include ctype/isprint.def
+
+@page
+@include ctype/ispunct.def
+
+@page
+@include ctype/isspace.def
+
+@page
+@include ctype/isupper.def
+
+@page
+@include ctype/isxdigit.def
+
+@page
+@include ctype/toascii.def
+
+@page
+@include ctype/tolower.def
+
+@page
+@include ctype/toupper.def
+
+