Graph Viz Software from Bell Labs ("very beta" release - 4/12/95)

These programs are released under a non-commercial license as
found in the Web page http://www.research.att.com/orgs/ssr/book/reuse
(also found in license.txt in this directory).

This package contains:
    dotty - X windows graph viewer with customizable interface
        (implemented in the Lefty programmable graphics editor)
    tcldot - TCL/tk graph viewer (written by John Ellson)
    dot - batch program for drawing directed graphs as hierarchies
    neato - batch program for drawing undirected graphs using Kamada-Kawai
        spring models

The underlying libraries are:
    libdict - splay tree and hash table dictionaries (written by Phong Vo)
    libgraph - an old version of the base graph library for dot and neato
    libgd - GIF driver from the Quest Center at Cold Spring Harbor Labs

User's guides and man pages are included under doc.  The dict.3 man
page doesn't seem to be up to date with the current libdict (send your
requests to kpv@research.att.com).  The source release is still rough,
but generally usable.   See src/README for details.  Read the doc files
to learn how to run the programs.  Some sample graphs can be found in
"digraphs" and "ugraphs".

Remember to set LEFTYPATH to the rooted pathname of the directory where
lib/lefty is installed, if you move this after compiling src/cmd/lefty.

We intend to keep a directory of contributed software in
	ftp://research.att.com/dist/drawdag/contrib

Our Plans
    A new Libgraph is available in
        ftp://research.att.com/dist/drawdag/libgr.tgz
    It follows the old Libgraph model, but is not exactly plug compatible.
    A new version of dot is (slowly) being written on top of new Libgraph.
    We would like it to provide a cleaner library interface and embody new
	algorithms to support compound nodes, incremental layout, and probably
	an improved undirected graph layout algorithm.

We are very interested in porting dotty to WN/T or making it work with
OLE in Windows.  We're also interested in upgrading Lefty to use Motif widgets.

Special thanks to John Ellson, who contributed invaluable assistance and
advice toward configuring and packaging this software.

    Eleftherios Koutsofios          Stephen North
    ek@research.att.com             north@research.att.com
