Hypertext Construction:

In constructing an application, a developer must parse information into 
small, discrete units (nodes) which consist of a single concept or idea.  
Nodes should be both semantically and syntactically discrete, representing 
a single idea or thematic statement.  These idea units, or nodes, which 
are usually displayable on one screen, can be classified as either 
"untyped" or "typed".  Untyped nodes are idea units that have no label or 
descriptor to identify the information they contain.  Typed nodes are 
labeled as a means of classifying the nodal information and defining 
particular nodal applications.  

<hfig15.pcx>  The Assembly of a Hypertext System

Associative links establish nodal relationships and connect individual 
ideas to related points, sources, ancillary information, and annotations. 
As with the nodes, the links themselves can be assigned "type". The origin 
of an associative link is a point called "link reference".  This "point" 
is a character, token, or icon that identifies a link in a document.  A 
link destination consists of a node or region of text (or graphics, etc.), 
and is called a "link referent" (Fiderio, 1988).  Links provide the 
primary means of discretionary navigation through the network and 
hierarchical structure of a hypertext system.

<cfile24>   CRISTAL Data Links
<cfile30>   Four Types of Hypertext
<cfile32>   Hypertext Navigation
<cfile33>   Hypertext Faults
<cfile38>   Knowledge Communities