HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau...

Existing classification schemes and thesauri are lacking in well-defined semantics and structural consistency. Empowering end users in searching collections of ever increasing magnitudes with performance far exceeding plain free-text searching (as used in many Web search engines), and developing systems that not only find but also process information for action, requires far more powerful and c...

Thesauri are used to tag semi-structured documents, texts, while more complex semantic structures are used to describe (annotate) scientific data. We are creating a Global Agricultural Concept Scheme (GACS) by mapping AGROVOC, CABT and NALT – three major thesauri in the area of food and agriculture, with a beta release in May 2016. We see GACS as a hub linking user-oriented thesauri with semant...

Various lexical resources are being published in RDF. To enhance the usability of these resources, identical resources in different data sets should be linked. If lexical resources are described in different natural languages, then techniques to deal with multilinguality are required for interlinking. In this paper, we evaluate machine translation for interlinking concepts, i.e., generic entiti...

Ontologies play a vital role in many Web and internet related applications. However the demand on ontologies does not always meet with their availability and the manual construction of a high quality ontology is an expensive and time-consuming process. This work, presents a system for accelerating the ontology building process via semi-automatically learning a hierarchal ontology given a set of...

The construction of complex ontologies can be facilitated by adapting existing vocabularies. There is little clarity and in fact little consensus as to what modifications of vocabularies are necessary in order to re-engineer them into ontologies. In this paper we present a method that provides clear steps to follow when re-engineering a thesaurus. The method makes use of top-level ontologies an...

The paper aims at providing a description of EARTh, the Environmental Application Reference Thesaurus. It represents a common general thesaurus for the environment, which has been published as a SKOS dataset in the Linked Open Data cloud. It promises to become a core tool for indexing and discovery environmental resources by refining and extending GEMET, which is considered the de facto standar...

Sources like thesauri or taxonomies are already used as input in ontology development process. Some of them are also published on the LOD using the SKOS format. Reusing this type of sources to build an ontology is not an easy task. The ontology developer has to face different syntax and different modelling goals. We propose in this paper a new methodology to transform several non-ontological so...