1.0 What is GED? GED is an editor dealing with a special kind of objects: graphs, also known as networks. Not only can GED edit a graph, but it can also compute some invariants associated to the graph. The current version (0.0) has been developped at the University of Geneva by the CRAAL (Centre de Recherche en Architecture et Architecturologie) with the help of a fund by the Swiss National Foundation for Scientific Research (SNFSR). GED can be used on a variety of machines and operating systems, due to the extensive use of the multiplatform GUI library wxWindows (see below). Thus GED works on PC (MSWindows 3.x, MSWinNt), and on UNIX (currently sun4 with SunOS 5.4, and Linux). 1.1 Why did we develop GED? Although GED can be used as a stand-alone project, it has been developped with an architectural background. More specifically, GED is meant as a tool for analyzing some properties (formal, relational, etc) of a building or of a project. As such, it can read graph files produced by the TOP application (also developped by our research group). We will say more about this topic later, so please keep looking at this page... 2.0 Where can GED be obtained? The Solaris (for SUN) has additional features since the 16th Aug. 1996; these features are still under developpment, and thus they are not yet available for the other supported platforms. They include: Corrected bug: there was a problem with the computation of eigenvalues of graphs having isolated vertices. New drawing algorithms. The work currently done is a preparation toward different editing modes (text/drawing) (in the long run) Some utilities are to be soon implemented (not yet available), including: adding many vertices/edges in one step, and generating a random graph. Correction: Now (16 sept. 1996), the 16-bit Windows executable with new features is also available (in compressed and uncompressed forms). 3.0 Copyright issues Please read carefully this section: GED is NOT in the public domain. However, it can be freely used, except for commercial use and for significant military applications. These limitations are due to the fact that GED uses some libraries which provide specific uses. In case of doubt, please contact the author (nanchen@divsun.unige.ch). Please note that no warranty of whatsoever kind is made about any particuliar use of GED, not even that it will not burn down your computer. I'm pretty confident that GED is quite robust and that it will not wipe away all the files of your hard disk... but if it does, I will not take any responsability: use it at your own risk!