A package consists of two PARTS: package specification and package body. The package specification contains the names of procedures and functions, their parameters, and return types; whereas, the subprogram code is part of the package body. Developers who require calling the procedures or functions just need to have ACCESS on the package specification. THEREFORE, the package owner can grant privilege on the package specification while HIDING the package body. In this way, the developers can use the package WITHOUT seeing the actual code. In addition, package owners can create procedures and functions that are private for the package and need not be part of the package specification. In this way, information hiding is achieved within a package.

A package consists of two parts: package specification and package body. The package specification contains the names of procedures and functions, their parameters, and return types; whereas, the subprogram code is part of the package body. Developers who require calling the procedures or functions just need to have access on the package specification. Therefore, the package owner can grant privilege on the package specification while hiding the package body. In this way, the developers can use the package without seeing the actual code. In addition, package owners can create procedures and functions that are private for the package and need not be part of the package specification. In this way, information hiding is achieved within a package.