Dynamic hypertext: Querying and linking

There are many models of hypertext, distinguished by a number of factors su ch as the underlying semantic data model (link typing and node typing), the degree of dynamic linking in the hypertext, and how dynamism and other beh aviours are implemented. This essay examines a particular approach to dynam ism in hypertext, based on the degree of similarity between a text passage in a source node and the text of a target node. It reviews work carried out over the past decade in creating systems for markup-based querying and dyn amic hypertext, with particular emphasis on a model of dynamic hypertext th at computes hypertext links on the fly using queries.