A macro and/or template processor written in Tcl for Tcl, by [William Duquette].
See http://www.wjduquette.com/expand/index.html for its homepage.

This is a useful tool for conversion of tcl-based documents into other formats. The range of applications include

   * Generation of website with uniform look & feel. See the homepage [http://www.wjduquette.com/] of the expand author, or [AK]'s [memchan] website at SourceForge [http://memchan.sourceforge.net] for examples of this.
   * Conversion of manpages in a tcl-based markup to HTML, nroff, TMML, etc.

   * Generation and setup of Makefiles for an extension based upon a template.

   * Provide a generic support to update a set of files depending on single definition file (tcl script)

All of this falls under the broad category of [Template and Macro processing].



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BUT, with 8.5, expand also becomes the closest thing Tcl has to a conventional keyword.  See TIP 157 [http://www.tcl.tk/cgi-bin/tct/tip/157.html] for the
details.
[[expand [syntax] ...]]

[[Would someone please take on the painful task of explaining the Tcl 8.5
meaning of expand in a way that a Tcl novice will understand?]]

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[Category Application] | [Category Package], a part of [Tcllib] (/[textutil])
| [Category Command]