A State of Art Survey on ZigZag Structures

Zz-structures are particular data structures capable of rep- resenting both hypertextual information and contextual in- terconnections among different information. The focus of this paper is to stimulate new research on this topic, by providing, in a state of the art survey, a short de- scription and comparison of all the material that, to the best of our knowledge, is related to zz-structures: infor- mal and formal descriptions, implementations, languages, demonstrations, projects and applitudes of zz-structures; in fact, despite their large use in different fields, the literature lacks of an exhaustive and up-to-date description of them.