File extension pkg information

A PKG file usually contains object and class definitions. This means that a PKG file needs to be compiled into a dataFlex program but only once. The USE command is an application that guards against the compilation of PKG files more than once into the same program. File extension PKG works in direct contrast to the INC files which are assumed included into the source file more than a single time. DataFlex is an object oriented database programming language that runs programs without being recompiled across UNIX and windows platform.
File extension PKG does identify Mac OS X installer package files. These are executable files that belong to the Apple MAC operating system. The package of compressed installer files is used in the installation of software program that commonly installs software in Mac OS X. this software may be installed individually or be referenced by an installer script within the software. The files are stored by double clicking the package. The control click followed by selecting Show Package Contents makes it possible to view the files stored in the package.