A model of a collection of documents based on partial Boolean algebras is presented. This model has been considered while analysing a problem of integration of thesauri. Some properties of partial Boolean algebras are exploited in defining theoretical tools for information retrieval associated to this model. Such tools are a logical language representing queries to the system and a browsing mec...

Purpose To propose a comprehensive and semi-automatic method for constructing or updating knowledge organization tools such as thesaurus. Methodology We propose a comprehensive methodology for thesaurus construction and maintenance combining shallow NLP with a clustering algorithm and an information visualization interface. The resulting system TermWatch, extracts terms from a text collection, ...

Our group participated in the Japanese and English Retrieval Subtasks of TCIR-6. Our goal was to evaluate the effectiveness of a thesaurus constructed from patents for invalidity search. To confirm the effectiveness of our thesaurus-based query expansion, we conducted experiments and found that our method can improve upon traditional document retrieval systems.

In this paper we describe the semi-automatic process of transforming the Russian language thesaurus RuThes to WordNet-like thesaurus, called RuWordNet. In this procedure we attempted to achieve two main characteristic features of WordNet-like resources: division of data into part-of-speech-oriented structures with cross-references between them and providing a set of relations similar to WordNet...

We first describe four varieties of thesaurus: (1) Roget-style, produced to help people find synonyms when they are writing; (2) WordNet and EuroWordNet; (3) thesauruses produced (manually) to support information retrieval systems; and (4) thesauruses produced automatically from corpora. We then contrast thesauruses and dictionaries, and present a small experiment in which we look at polysemy i...

In many areas of work, large amounts of information accumulate. Ways to store and access this information have been the subject of much research for the last century and even earlier. The advent of computers has greatly extended the possibilites for information retrieval. However the situation is still not an ideal one; many problems still exist. Many of the problems associated with current mul...

Gorman and Curran (2006) argue that thesaurus generation for billion+-word corpora is problematic as the full computation takes many days. We present an algorithm with which the computation takes under two hours. We have created, and made publicly available, thesauruses based on large corpora for (at time of writing) seven major world languages. The development is implemented in the Sketch Engi...

Although-or perhaps because-environmental health concerns affect every person on the planet, scientists often suffer a modern day Tower of Babel syndrome, using a diversity of terms in all different languages to describe the same ideas. So European, American, and international agencies have decided to collaborate on the development of a global multilingual environmental thesaurus to eliminate t...