Content oriented relations between text units---a structural model for hypertexts
Rainer Hammwöhner, Ulrich Thiel · 1987
A common feature of various recently developed information systems is the decomposition of linear document structures which are enforced by conventional print media. Instead, a network organization of information units of different forms (textual, graphical, pictorial and even auditive presentation modes may be combined) is provided. Documents organized this way are called “hypertexts”. However, two questions arise immediately when an effort is made to build information systems on the basis of this conception: