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Abstract

The first part of the chapter presents a synthesis of recent works in the domain of hyperbooks and introduces a general hyperbook model. In this model, a hyperbook is made of a knowledge structure, a set of informational fragment, links between the fragments and the knowledge structure, and a user interface specification. This specification is used to generate the actual reading interface which is a hypertext whose nodes and links are derived from the knowledge and fragment structures. The knowledge structure provides a mean to interconnect different hyperbooks in a semantically consistent way, so as to create digital libraries of hyperbooks. The second part explains in more details the knowledge structure alignment process that is at the heart of the semantic interconnection of hyper-books. The presentation is based on a real-world example, in the domain of agriculture. It also provides experimental results about the performance, in terms of precision and recall, of this process.

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Abstract

When the Web was invented, it was touted as a novel nonlinear medium for the written word. No longer would we be constrained by linear presentations! Hyperlinks would allow us to jump haphazardly from page to page, chapter to chapter, idea to idea! Texts would no longer need to run from beginning to end! This is misleading. A printed book is also multidimensional and potentially nonlinear. We can open it to any page, from any other page, for any reason. We can open several books at once. In fact, what makes a book special is its combination of linear structure (the order of the words) and nonlinear physicality (the bound papers). This linear/nonlinear duality is enhanced further by the index, which maps linearly sequenced pages in a nonlinear, informationally ordered structure (architecture). In truth, the online environment is crippled by an absence of linear structure. Imagine selecting a hard cover book, tearing off the covers, ripping pages into small pieces, and throwing them in a box. That box is like a computer file system, and the paper scraps are Web documents. Only one scrap can be retrieved from the box at a time, and it must be replaced before another can be accessed. Page numbers are meaningless. Global context is destroyed. And without page numbers or context, what happens to the index?

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Date

22. 3.2009 12:51:47

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Date

12. 8.2012 18:05:22