Abstract—Graphs are the most common abstract structure
encountered in computer science. Many modern systems,
particular for graphics workstations, include structural
information visualization. In this paper, we consider practical
and general graph formalism called hierarchical graphs and
present the Higres and Visual Graph systems aimed at
supporting of information visualization on the base of
hierarchical graph models.
Keywords-hierarchical graph; graph drawing; information
visualization
I. INTRODUCTION
Graphs are used almost everywhere in computer science
and programming [13]. Any system that consists of discrete
states (or sites) and connections between them can be
modeled by a graph.
Graph models can be effectively used in practice only
along with support tools that provide visualization, editing
and processing of graphs. For this reason many graph
visualization systems, graph editors and libraries of graph
algorithms have been developed in recent years. Examples of
these tools include VCG [16], daVinci [5], Graphlet [10],
GLT&GET [15], yEd [19 ] and aiSee [1].