Reflections on NoteCards: seven issues for the next generation of hypermedia systems
Communications of the ACM
Industrial strength hypermedia: requirements for a large engineering enterprise
HYPERTEXT '91 Proceedings of the third annual ACM conference on Hypertext
HyperText: The Electronic Labyrinth
HyperText: The Electronic Labyrinth
Computer Lib/Dream Machines
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Hypertext is both the concept of interrelating information elements (linking pieces of information) and the name used to describe a collection or web of interrelated or linked nodes. (An information element or node can range from a single idea or chunk to an entire document.) A hypertext system allows an author to create the nodes and the links among them, and allows a reader to traverse these links, i.e. to navigate from one node to another using these links. Typically, hypertext systems mark link access points or link anchors in some manner within a node when displaying it on a computer screen (e.g. underlined--often blue--text displayed within documents on World Wide Web browsers). When the user selects the link marker, e.g. by clicking on it with a mouse, the hypertext system traverses to and displays the node at the other end of the link. If a single link marker represents multiple links, the hypertext system may present the user with a list of available links. (System designers may have to rank, filter, or layer this list if the number of possible links might overwhelm the reader.) Hypertext user interface design principles recommend that authors label the link marker if the link's purpose or destination is not clear. Hypertext systems include many navigation, annotation and structural features which take advantage of the node and link structure to support authors and readers. These components and features are described further below.