Time Diagram

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Time dependence graph picture at normal size;
Time dependence graph picture, detail;
Time dependence graph specification.

Description

This is a time graph and shows the dependences in the history of different Unix versions. This example is recreated according to a picture in A. Silberschatz, J. Peterson, P. Galvin: Operating System Concepts, Fig. 15.1, Addison Wesley 1991 . The very first original of this picture was in Leffler/McKusick/Karels/Quarterman: The design and Implementation of the 4.3 BSD UNIX Operating System. Fig. 1.1 Addison Wesley 1989 . We used splines in this example which looks nice if the graph is printed to PostScript. However for an interactive display, splines are not always useful since spline drawing is not very fast.

Last change: 21.4.1995 Georg Sander / sander@cs.uni-sb.de