A collection of packages by [John Ellson], providing abstract [graph] representation and layouting functions for [Tcl] programs. It consist of two packages: '''tclgdr''': A [graph] datastructure that provides callbacks for node insertion or modification and import functions for the graphviz [http://www.graphviz.org] [dot] graph description language. '''tclgdl''': A dynamic layouter that can be bound to a graph datastructure via callbacks/events. It provides raw graph layout facilities and can be bound via callbacks/events to a graph display, for example the Tk canvas. ---- [schlenk]: It should be possible to use tclgdl to easily layout a [graph] created with ::[struct]::[graph]. One would have to implement some [callback]s, so tclgdl gets notified about insertions and modifications on the graph, and one had to provide a basic rendering infrastructure to show the graph on a [canvas]. ---- [EMJ] (01 Sep 2011) : No link here except http://www.graphviz.org, doesn't seem to exist there, or anywhere else. <> Package | Graph theory