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Created by Tim Berners-Lee in 1989/1990, HTML was the heart of the World Wide Web. Today, HTML is dead, replaced by XHTML which is HTML reformulated as an instance of XML. As technical communication moves into an era in which Flare works in native XHTML, ePublisher Professional outputs XHTML, and so on, it's important to know what XHTML is in order to understand how it will affect your work and choice of tools. This paper summarizes XHTML. The conference presentation will go into more detail

Portable document format (PDF) has become the de facto standard in many fields because of its independence of local formatting restrictions and its accurate reproducibility. On the other hand, HTML documents are becoming an integral form of our lives by being the dominant form for information exchange within the World Wide Web environment. This paper discusses how image-processing techniques can be used to perform document layout analysis of complex multiple-column PDF documents. This analysis allows the conversion of these documents into the HTML format keeping the logical and physical layout intact.

SGML is the international standard for digital documents to be used in fields like intranet, CALS/EC, and so on. On the other hand, there is a notable problem that in spite of having a similar structure and being conceptually the same kind of document, many SGML documents have different DTDs and are stored in different databases. We propose an algorithm that automatically unifies DTDs of these SGML documents using a tree structure and finite automata. Constructing the SGML document database to apply the proposed algorithm reduces the number of database accesses and increases the efficiency of information retrieval. It provides a more effective management and operation environment for SGML document databases.

In CALS or EC, it is important to share product information conformable to business standards. This paper proposes a conformance-testing method for authorizing SGML/XML documents to follow business standards about document content constraints, such as standard vocabularies, datatypes, ranges of numerical values and units of measures. This method can promote reliable document sharing in information systems by circulating documents which passed the conformance-test.