Identifiers

^Lexer
IDENT :
      NAMED_IDENT
   | POINT_COLLECTION

NAMED_IDENT :
   Start Continue^*

POINT_COLLECTION :
   (Point '^*)⁺

Where Start is any unicode character with the Alphabetic property or an underscore (_) character, Continue is Start or a tick (') character and Point is any unicode character with the Uppercase property.

Identifiers mostly represent variables, though they may also serve as a rule operator, a function, a value for a display property or a flag value. See also: names.

Point collections are a special kind of identifiers. They essentially represent a sequence of variables, each being a point.