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5.9.3 Declarations

Declarations introduce new entities that denote types, variables, attributes, and packages. Some declarations can only appear immediately within a project declaration. Others can appear within a project or within a package.

    declarative_item ::= simple_declarative_item
      | typed_string_declaration
      | package_declaration
    simple_declarative_item ::= variable_declaration
      | typed_variable_declaration
      | attribute_declaration
      | case_construction
      | empty_declaration
    empty_declaration ::= *null* ;

An empty declaration is allowed anywhere a declaration is allowed. It has no effect.