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Abstract

In this paper the possibility to develop a richer relational structure for thesauri is explored and described. The development of a new environmental thesaurus - EARTh (Environmental Applications Reference Thesaurus) - is serving as a case study for exploring the refinement of thesaurus relational structure by specialising standard relationships into different subtypes. Together with benefits and opportunities, implications and possible challenges that an expanded set of thesaurus relations may cause are evaluated.

Object

EARTh-Thesaurus

Theme

Konzeption und Anwendung des Prinzips Thesaurus

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Abstract

A thesaurus is a controlled vocabulary designed to allow for effective information retrieval. It con- sists of different kinds of semantic relationships, with the aim of guiding users to the choice of the most suitable index and search terms for expressing a certain concept. The relational semantics of a thesaurus deal with methods to connect terms with related meanings and arc intended to enhance information recall capabilities. In this paper, focused on hierarchical relations, different aspects of the relational semantics of thesauri, and among them the possibility of developing richer structures, are analyzed. Thesauri are viewed as semantic tools providing, for operational purposes, the representation of the meaning of the terms. The paper stresses how theories of semantics, holding different perspectives about the nature of meaning and how it is represented, affect the design of the relational semantics of thesauri. The need for tools capable of representing the complexity of knowledge and of the semantics of terms as it occurs in the literature of their respective subject fields is advocated. It is underlined how this would contribute to improving the retrieval of information. To achieve this goal, even though in a preliminary manner, we explore the possibility of setting against the framework of thesaurus design the notions of language games and hermeneutic horizon.

Theme

Konzeption und Anwendung des Prinzips Thesaurus

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Abstract

This paper focuses on polysemy, the phenomenon by which a word has a network of multiple but related senses, as a characterizing feature of the philosophical lexicon. Many philosophical terms, in fact, are typified by a considerable stratification of meaning, which originates from the history of their semantics, where meanings accumulate over time and past knowledge is continually reintroduced and reelaborated into new forms of theorizations. Developing a domain-specific knowledge organization system (KOS), like a thesaurus, would be largely affected by this feature. The demand for semantic disambiguation is, in fact, amplified. Furthermore, together with their frequent polysemy, the level of abstraction of the philosophical terms and the conceptual complexity of this domain make the thesaural semantic arrangement, especially the hierarchical structures, rather difficult to be set up. On the basis of a Wittgensteinian conception of meaning and its implication for information retrieval issues, some preliminary ideas on how to proceed on this topic are presented.