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By specifying that published datasets must link to other existing datasets, the 4th linked data principle ensures a Web of data and not just a set of unconnected data islands. We propose in this paper the term data linking to name the problem of finding equivalent resources on the Web of linked data. In order to perform data linking, many techniques were(More)
Ontology matching consists of finding correspondences between entities of two ontologies. OAEI campaigns aim at comparing ontology matching systems on precisely defined test cases. Test cases can use ontologies of different nature (from simple directories to expressive OWL ontologies) and use different modalities, e.g., blind evaluation, open evaluation,(More)
In this paper, we present h-match, an algorithm for dynamically matching distributed ontologies. By exploiting ontology knowledge descriptions, h-match can be used to dynamically perform ontology matching at different levels of depth, with different degrees of flexibility and accuracy. h-match has been developed in the Helios framework, conceived for(More)
Ontology matching consists of finding correspondences between semantically related entities of two ontologies. OAEI campaigns aim at comparing ontology matching systems on precisely defined test cases. These test cases can use ontologies of different nature (from simple thesauri to expressive OWL on-tologies) and use different modalities, e.g., blind(More)
Ontology matching consists of finding correspondences between on-tology entities. OAEI campaigns aim at comparing ontology matching systems on precisely defined test cases. Test cases can use ontologies of different nature (from expressive OWL ontologies to simple directories) and use different modalities , e.g., blind evaluation, open evaluation,(More)
In the semantic web environment, where several independent ontologies are used in order to describe knowledge and data, ontologies have to be aligned by defining mappings among the elements of one ontol-ogy and the elements of another ontology. Very often, mappings are not derived from the semantics of the ontologies that are compared. Rather, mappings are(More)
The evaluation of matching applications is becoming a major issue in the semantic web and it requires a suitable methodological approach as well as appropriate benchmarks. In particular, in order to evaluate a matching application under different experimental conditions, it is crucial to provide a test dataset characterized by a controlled variety of(More)
In this paper, we discuss our experience in testing the HMatch match-making system by means of the tracks proposed in the ontology alignment evaluation initiative of 2006 1. HMatch is a system conceived for the goal of ontology matching in open and distributed systems. It is based on linguistic and structural matching techniques for the evaluation of(More)
— In this paper, we present a methodology for ontology evolution, by focusing on the specific case of multimedia ontology evolution. In particular, we discuss the situation where the ontology needs to be enriched because it does not contain any concept that could be used to explain a new multimedia resource. The paper shows how ontology matching techniques(More)