DoNaLD : a line-drawing system based on definitive principles
Meurig Beynon, David Angier, Tim Bissell, Steve Hunt · Warwick Research Archive Portal (University of Warwick) · 1986
The DoNaLD line-drawing system has been designed to illustrate how a generalised spreadsheet (or "definitive notation") can provide a simple medium for interactive graphics. Novel features of DoNaLD are: the use of variables based upon the recursive specification of a line-drawing as a union of points, lines and subdrawings, and a complementary user interface based upon windows of definitions.