In this paper, we describe linguistically sophisticated tools for the automatic annotation and navigation of on-line documents. Creation of these tools entails research on finite-state technologies for the design and development of lexically-based semantic indexing, shallow semantic understanding, and content abstraction techniques for texts. These tools utilize robust language processing techniques to generate multi-purpose data structures called lexical webs , used in the creation of TexTract , an automated semantic indexing program designed to parse, index, and hyperlink on-line texts.
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