A thesaurus is a special kind of controlled vocabulary where the terms (which correspond to the entries of the thesaurus) are structured by using linguistic relationships such as synonymy, antonymy, hyponymy or hypernymy. A thesaurus (like Wordnet) is not an ontology because it only deals with terms (i.e. the linguistic level), without considered the concepts and the relations of the domain (i.e. the conceptual or knowledge level). A thesaurus is therefore similar to a dictionary with the difference that it does not provide word definitions, its scope is limited to a particular domain, entry terms are single-word or multi-word entries and that it facilitates limited cross-referencing among the contained terms (e.g. synonyms or antonyms).
Published in Chapter:
OSIRIS: Ontology-Based System for Semantic Information Retrieval and Indexation Dedicated to Community and Open Web Spaces
Francky Trichet (University of Nantes: Team Knowledge and Decision (KOD), France), Xavier Aimé (University of Nantes: Team Knowledge and Decision (KOD), France), and Christophe Thovex (University of Nantes: Team Knowledge and Decision (KOD), France)
Copyright: © 2011
|Pages: 19
DOI: 10.4018/978-1-61520-883-8.ch021
Abstract
OSIRIS (Ontology-based Systems for Semantic Information Retrieval and Indexation dedicated to community and open web Spaces) is a platform dedicated to the development of community web spaces which aim at facilitating both semantic annotating process and searching process of multimedia resources. Based on the use of both heavyweight ontologies and thesauri, OSIRIS allows the end-user (1) to describe the semantic content of its resources by using an intuitive natural-language based model of annotation which is founded on the triple (Subject, Verb, Object), and (2) to formally represent these annotations by using Conceptual Graphs. Each resource can be described by adopting multiple points of view, which are usually provided by different end-users. These different points of view can be defined by using multiple ontologies which can be related to connected (or not-connected) domains. Developed from the integration of Semantic Web technologies and Web 2.0 technologies, OSIRIS aims at facilitating the deployment of semantic, collaborative, community and open web spaces. The use of OSIRIS is illustrated in the context of a project dedicated to the preservation of French popular and cultural heritage.