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1.4 Identiers

Identiers denote constants, types, variables, procedures and functions, units, and programs. All names of things that are dened are identiers. An identier consists of 255 signicant characters (letters, digits and the underscore character), from which the rst must be an alphanumeric character, or an underscore (_) The following diagram gives the basic syntax for identiers.

_________________________________________________________________________________________________________ Identiers
-- --identi er-|letter---|-------------------------------------------- --x --- 6-|letter---- |digit--| --x ---
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