Identify a package specification and body

o A package has two separate parts – the specification and the body.
o Each of them is stored separately in the data dictionary.
o This enables you to change to definition of a program construct in the package body without causing the Oracle server to invalidate other schema objects that call or reference the program construct.
o Package cannot be local unlike procedures and functions.
o You can drop the body of a package while retaining the package specification.
o You cannot drop the package specification while retaining the package body.
o If you remove the package specification, then the package body is removed.
o This is because a package specification can exist without the package body but the package body cannot exist without the package specification.
o The package specification is required but the package body is optional.