Notation: Symbols and Separators  13  Figure  1.r  Syntax diagram for  CharacterString  Figure l.g  Syntax diagram for  Directive  Examples of strings:  'a'  ';'  '3'  'begin'  'don"t'  This  string has  33 characters.'  Labels are unsigned integers used to mark a Pascal statement. Their  apparent value must be in the range 0 to 9999.  Examples of labels:  13  00100  9999  1.F.  Labels  Directives are names that substitute for procedure and function blocks.  Directives have the same syntax as identifiers. (See Chapter 11.)  l.G.  Directives  --------..  ~I  Letter  I-I----;;~r__-.---~--f-------- .....  Digit 