Bridging paradigms: Spatial hypertext in a document world

Introduction Spatial hypertext has arisen from overview “map” representations of conventional nodeand-link hypertexts (Shipman and Marshall, 1999). These spatial representations (e.g., Streitz et al., 1989; Marshall and Shipman, 1995; Shipman et al., 2001), can be used to model abstract relationships, encoding them using a variety of visual attributes such as relative or absolute position, size, color, shading, etc. Each node in such a data structure represents one or more objects.