PC-Hypertext: Associative Links Step 3. Each file was assigned a minimum of three links: a reference to the preceding file in a nodal chain, a reference to the subsequent file, and a source reference (title, section, page number). Links were assigned by enclosing the referenced filename and its descriptor in carets "< >" at the desired location in the host file. Additional "explanation" and "choice" links were then added to each file as required. "Explanation" links occur within a paragraph of text, providing access to information supplementing the word or idea expressed at the point of reference. "Choice" links were displayed in lists at the end of a body of text, indicating access to a continuum of associated or parallel ideas in the network. PC-Hypertext: Information Parsing PC-Hypertext: Idea Index