This paper illustrates the conversion from a traditional thesaurus in agriculture (AGROVOC) to a new system, the Agricultural Ontology Service Concept Server (AOS/CS). The Concept Server will serve as a multilingual repository of concepts in the agricultural domain providing ontological relationships and a rich, semantically sound terminology. The Food and Agriculture Organization recently deve...

A two-tier model for the description of morphological, syntactic and semantic variations of multi-word terms is presented. It is applied to term normalization of French and English corpora in the medical and agricultural domains. Five different sources of morphological and semantic knowledge are exploited (MULTEXT, CELEX, AGROVOC, WordNetl.6, and Microsoft Word97 thesaurus). 1 I n t r o d u c t...

Achieving semantic interoperability is a difficult problem with a lot of challenges yet to address. Some of them include matching large-scale data sets, tackling the problem of missing background knowledge, evaluating large scale results, tuning the matching process and doing all of the above in a realistic setting with resource and time constraints. In this paper we report the results of a lar...

OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. Alignement d'ontologies : exploitation des ontologies liées sur le web de données. Alignement d'ontologies : exploitation des ontologies liées sur le web de données Résumé. Nous proposons dans cet article une méthode d'alignement d'une on-tologie source av...

This paper presents an original method of knowledge base (ontology) creation from transformations of several sources of knowledge. These sources are derived from the knowledge organization systems (thesauri, taxonomies, etc.). The sources are weighted by a confidence score. The method is based on a module aggregating ontological design patterns. We have implemented this method in an agronomical...

Introduction. The goal of domain ontology is to provide a common conceptual vocabulary to members of a virtual community of users who need to share their information in a particular domain (such as medical, tourism, banking, agricultural). The identification and definition of concepts that describe the domain knowledge requires a certain consensus. Generally, each member or subcommunity holds s...

In order to participate to the Linked Data for agriculture, we want to use AGROVOC that is a multilingual thesaurus maintained by FAO with more than 40,000 terms. We present here a state of the art about techniques proposed to transform a domain ontology from thesaurus. For this we will study ten methodologies along three axes: the extraction of classes, the extraction of the hierarchy and othe...