EDGE: an extended directed graph editor and its applications

Visual representations of directed graphs, in one form or another, are used quite extensively in a wide variety of applications areas from PERT charts to circuit design. Programs that allow users to create and manipulate attributed directed graphs on graphics workstations have therefore become common. However, the programming effort required to produce such applications is significant and usually involves interaction with a complex graphics package. We present an Extended Directed Graph Editor, EDGE, that provides application programmers with an object-oriented editor for generic directed graphs. This editor may be used as a rapid prototyping tool and customized to obtain high quality graphical front-ends without interacting with a general-purpose graphics package.