What access modifiers exist in the Swift language?

In Swift, there are five access modifiers:

• open: Accessible from any source file in the defining module and from any other module importing the defining module. Subclassing and overriding are possible from any module.
• public: Accessible from any source file in the defining module and from any other module importing the defining module. Subclassing and overriding are only possible within the module.
• internal: Accessible from any source file in the defining module, but not from external modules. Default.
• fileprivate: Accessible only from the source file in which it is defined.
• private: Accessible only within the scope of the declaration, including nested types and extensions within the same source file.