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Department of Computer Science University of Helsinki


In short:

The TYTTI project (Knowledge Worker's Workstation or Tietotyöläisen työasema) is a three-year project (2000-2002) funded by the National Technology Agency (Tekes) and five Finnish companies (Nokia, Alma Media, Sanoma-WSOY, Vaisala and Lingsoft). The project is part of the TEKES USIX programme.

The researchers are: Helena Ahonen-Myka (responsible leader), Marko Salmenkivi (project manager 1.8.2001-), Greger Lindén (project manager 1.8.2000-31.7.2001), Mika Klemettinen (project manager 1.3.-31.8.2000), Oskari Heinonen, Miro Lehtonen, Juha Makkonen, Jussi Piitulainen, Henri David (1.1.-30.6.2001), Antoine Delaunay (1.1.-30.6.2001), Martin Fluch (1.6.2001-), Andrei Popescu (1.9.2001-), Renaud Petit (15.1.-30.6.2002).

About the project:

Nowadays, many people have jobs that can be described as being focused on knowledge. Everyday tasks may include gathering information from numerous sources, continuously keeping track of several sources of information, combining and modifying information, creating new publications by reusing document fragments, and storing interesting information into a personal knowledge base.

Traditionally, this kind of work is supported by search engines, word processors, desktop publishing systems, text database systems, or software tailored for a specific task combination. As a broader variety of tasks becomes necessary, due to the expanding amount of information available on the web, as well as the new opportunities to sell and deliver various information products via the web, new and flexible tools are needed.

In order to facilitate finding interesting information, we intend to enhance search engines with mediating levels between a short user query and the documents, e.g., by providing phrases that give possible contexts for the query terms. Moreover, we attempt to develop a filtering interface for information streams, through which the user could concentrate on information that he/she has not seen before, and hide the repetitious entries from different sources. Automatic fragmentation of documents which is based on the topic changes in text is an important basic tool which is often invisible to the user. Fragmentation makes it possible to economically retrieve and combine only the valuable parts instead of the entire documents which are often lengthy.

From our point of view, the emphasis is on the management of heterogeneous material: as the use of XML expands, the amount of XML documents with or without DTDs increases. The essential but not at all trivial task is to format and print arbitrary XML fragments or collections of both XML and HTML fragments, even if the corresponding layout specifications (e.g. XSL) are not available. We also offer means for storing new document composites as valid XML documents where the documents have been assembled from heterogeneous document fragments.

Project material:

Internal project material (reports, minutes, info etc.) (password protected pages)

Last modified: Monday, 23-Feb-2004 11:13:31 EET
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