The number, the size, and the dynamics of Internet information sources bears abundant evidence of the need for automation in information extraction. This calls for representation formalisms that match the World Wide Web reality and for learning approaches and learnability results that apply to these formalisms. The concept of elementary formal systems is appropriately generalized to allow for t...

Both LTEX and HTML are languages that can express the structure of a document, and similarities between these two systems are shown. A detailed study is made of the LaTeX2HTML program, written by Nikos Drakos, that is today the most complete utility for translating LTEX code into HTML, providing a quasi-automatic translation for most elements. A discussion of a few other tools for translating b...

Web technology evolves organically, rarely taking the straightest path to new places. The story of its dominant syntaxes is one example. Starting from very loosely defined SGML-inspired markup, it then went through a period of XML austerity that intended to curtail the race to the bottom between browsers in tag soup processing. Such a draconian approach failed, but out of the melee came HTML5 w...

HTML is often criticised for its presentation-oriented conception. But it does contain sufficient structural information for many everyday purposes and this has led to its development into a more stable form. Future platforms for the World Wide Web may support other applications of SGML, and the present climate of popularity of the Web is a suitable opportunity for consolidation of the more sta...

In recent times, the way people access information from the web has undergone a transformation. The demand for information to be accessible from anywhere, anytime, has resulted in the introduction of Personal Digital Assistants (PDAs) and cellular phones that are able to browse the web and can be used to find information using wireless connections. However, the small display form factor of thes...

Several significant problems exist when applying knowledge representation systems to real problems. In particular, the obscurity of LISP, the resource consumption, garbage collection, and the single user nature of most KR systems can prevent the technology from being accepted in many non-research environments. This paper briefly presents one way to address these problems with a web interface, a...

OCR is an error-prone process. It is time-consuming and expensive to manually proofread OCR results. The errors remaining in OCRed texts can cause serious problems in reading and understanding if they do not refer to the original image representation. As demonstrated in this paper, a hybrid document which combines symbolic representation and image representation may relieve the problem. If we r...

DOW is an extended World Wide Web interface for database systems. In addition to WWW browsing and navigation, DOW supports HTML document management as well-structured data objects in an ODBMS. We can access stored objects and adapted HTML documents using SQL, keywords, and schema browser. DOW has four main features. First, to manage HTML documents within a database, we introduced an HTML adapte...