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Practical Programming in Tcl & Tk, Third Edition
By Brent B. Welch

Table of Contents
Chapter 49.  Tcl 7.5/Tk 4.1


The package Command

The package command provides an alternate way to organize script libraries. It also supports extensions that are added with the load command. The package command supports a provide/require model where packages are provided by scripts in a library, and your application specifies what it needs with package require commands. The package facility supports multiple versions of a package, if necessary. Packages are described on page 163.


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