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Section 8: Visibility Rules
The rules defining the scope of declarations and
the rules defining which identifiers,
character_literals, and operator_symbols
are visible at (or from) various places in the text of the program are
described in this section. The formulation of these rules uses the notion
of a declarative region.
As explained in Section 3, a declaration declares
a view of an entity and associates a defining name with that view. The
view comprises an identification of the viewed entity, and possibly additional
properties. A usage name denotes a declaration. It also denotes the view
declared by that declaration, and denotes the entity of that view. Thus,
two different usage names might denote two different views of the same
entity; in this case they denote the same entity.
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