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This paper describes a hypertext system — Thoth-II. This system provides a rich means for modeling semantic interconnections among texts. It allows a user to browse texts, exploring their relations with other texts. These relations are modeled by a directed graph. The texts are embedded in the graph. Connections among specified phrases in the text and the graph structure are automatically formed. In the browsing mode the user is presented with an interactive graphic display of the directed graph. In the text mode the user can use multiple windows to display and interact with the stored text.
George Collier (Thu,) studied this question.