Tcl, the tool command language, is a simple scripting language for controlling and extending applications. It provides generic programming facilities such as variables, loops, and procedures. Its key features are its ability to be embedded within applications and its easy extensibility.
The Tcl programming language is described in detail in John K. Ousterhout's Tcl and the Tk Toolkit (Addison-Wesley, 1994). The widget toolkit supported by the IXI implementation is not compatible with Tk, and is described later in this guide. This chapter describes: