Package file dates, versions, and locations are stored in a package database.
A package is a schema object that groups logically related PL/SQL types, variables, constants, subprograms, cursors, and exceptions. A package is compiled and stored in the database, where many applications can share its contents.
A package always has a specification, which declares the public items that can be referenced from outside the package. If the public items include cursors or subprograms, then the package must also have a body. The body must define queries for public cursors and code for public subprograms. The body can also declare and define private items that cannot be referenced from outside the package, but are necessary for the internal workings like versions, and locations of the package.
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