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Design of Generalized Document Viewer Using Object Chain Representation
IEICE TRANSACTIONS on Information and Systems
Publication Date: 1992/09/25
Print ISSN: 0916-8532
Type of Manuscript: Special Section PAPER (Special Issue on Software)
object-oriented system, document preparation, file format,
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This paper proposes the GDV system, which provides a format-independent interface with which to access documents in various formats. It also proposes a new approach for document representation to be used in the GDV system. In this approach, a document is represented by a chain of objects, each of which belongs to a certain class and transforms access operations according to the class-specific transformation rule. A user's request is interpreted as a request to the uppermost object of the chain, transformed by objects in the chain successively, and executed by the lowermost object in the chain. The initial state of a document is an object chain containing an unidentified object. As the unidentified object identifies and divides itself, classification (and chain generation) proceeds step by step.