====== Character set ======
===== Definitions =====
==== graphic_character ====
  * basic_graphic_character
  * lower_case_letter
  * other_special_character

==== basic_character ====
  * basic_graphic_character
  * format_effector

==== basic_graphic_character ====
  * upper_case_letter
  * digit
  * special_character
  * space_character

===== Specification =====
(a) upper_case_letter
<code vhdl>A B C D E F G H I J K L M N O P Q R S T U V W X Y Z </code>

(b) digit
<code vhdl>0 1 2 3 4 5 6 7 8 9 </code>

<nowiki>(c)</nowiki> special_character
<code vhdl>" # & ' () * + , - . / : ; < = > _ | </code>

(d) space_character

(e) lower_case_letter
<code vhdl>a b c d e f g h i j k l m n o p q r s t u v w x y z </code>

(f) other_special_character
<code vhdl>! $ % @ ? [ \ ] ^ ` {} ~ </code>

(g) Format effectors ( format_effectors ) are

  * Tab (horizontal and vertical),
  * Carriage return,
  * Line feed and
  * Form feed.