The problem of knowledge heterogeneity in the Semantic Web or in the context of information syste... more The problem of knowledge heterogeneity in the Semantic Web or in the context of information systems remains a major challenge for the scientific community, in particular when several ontologies developed independently and separately have to be exploited to exchange their knowledge. Several works have addressed the semantic heterogeneity issue in ontologies and proposed to align them with additional knowledge. Recently a formalism taking into account the challenge of applied techniques to represent and reason on aligned ontologies was proposed by the authors. The authors proposed a contribution that can be seen as an extension of existing work on the heterogeneous ontologies integration. This formalism allows dealing with contextual representation and reasoning where ontologies and alignments by pairs of ontologies are developed in different and incompatible context. In this paper, some aspects of multi-level networked knowledge are recalled, detailing its semantics and discussing the comparison of the two semantics, DL-approach and DDL-approach, according to certain criteria, in order to measure their relevance and to give to readers a way to choose one semantics rather than another according to the context or the intended application.
2013 5th International Conference on Computer Science and Information Technology, 2013
ABSTRACT Integrated Distributed Description Logics (IDDL) offers the possibility to describe sema... more ABSTRACT Integrated Distributed Description Logics (IDDL) offers the possibility to describe semantic relations that exist between two ontologies in a networked-based system. However, in order to improve the expressivity of a distributed system, networked ontologies with context rules need to be integrated. OWL2Jess is a hybrid reasoning framework; that may be used to ensure the connection between OWL (Ontology Web Language) and JESS (Java Expert System Shell) in order to allow rules based reasoning on the ontology. It permits the conversion of OWL ontology code into Jess facts. Semantic pre-defined rules are used to encode the semantic of RDF (Resource Description Framework) and OWL, to check the consistency and compute the taxonomic classification. In this paper, pre-defined semantic rules by inserting IDDL inferences rules are extended and reused. The paper presents an approach to rule-based ontologies integration. It basically extends OWL2Jess/SWRL2Jess by rules borrowed from “Integrated Distributed Description Logic”. Further, it argues how the presented approach can be used to infer more information given axioms of local ontologies as well as axioms in the integrated ontologies. It provides also services of check local and global consistency of integrated OWL ontologies with alignments and context rules.
This paper describes a new formalism based on multi-level networked knowledge (MLNK), a combinati... more This paper describes a new formalism based on multi-level networked knowledge (MLNK), a combination of different ontologies describing heterogeneous and complementary domains aligned with semantic correspondences. Ontology alignments make explicit the correspondences between terms from different ontologies and must be taken into account in reasoning, where two explicit form of correspondences are given: mappings represent predefined relations such as subsumption, equivalence, or disjointness, that have a fixed semantics in all interpretations; as well as links that can relate complementary ontologies by introducing terms defined by experts, and their semantics varies according to interpretations. The proposed MLNK formalism can be transformed into a Distributed System capable of supporting DDL semantics. It permits to apply a contextual reasoning where ontologies and alignments by pairs of ontologies are developed in different and incompatible contexts. The semantic of the proposed formalism is extensively described along with an illustrative example.
International Journal of Metadata, Semantics and Ontologies, 2016
Integrating pre-existing, heterogeneous, and complementary ontologies, and exploiting them jointl... more Integrating pre-existing, heterogeneous, and complementary ontologies, and exploiting them jointly in reasoning remains a major challenge. Ontology alignments make explicit the correspondences between terms from different ontologies and must be taken into account in reasoning. Two forms of correspondences can be introduced: mappings represent predefined relations such as subsumption, equivalence, or disjointness, that have a fixed semantics in all interpretations; links can relate complementary ontologies by introducing terms defined by experts, and their semantics varies according to interpretations. Different experts can introduce different terms according to their points of view, which brings semantically heterogeneous links. Thus, integrating pre-existing networks of aligned ontologies requires aligning terminologies from different alignments, so as to form higher level alignments. This generates networked knowledge that can in turn be aligned with other networked knowledge. As a resultn we talk of multi-level networked knowledge, a concept that we formalise here and for which we propose a possible formal semantic for automating reasoning tasks. This semantic consists in reducing reasoning on networked knowledge to reasoning over DL formalisms for which we have reasoning procedures. The proposed approach is implemented and tested in order to compare results, for different networks.
2009 International Conference on Multimedia Computing and Systems, 2009
Abstract This paper describes the design of a fault diagnostic maintenance system for steam turbi... more Abstract This paper describes the design of a fault diagnostic maintenance system for steam turbines based on a domain ontology of the turbine and coupled to an expert system. The main data and information constituting the system come from disparate data bases with ...
2010 International Conference on Machine and Web Intelligence, 2010
... [6] Gruber, TR (1993), A translation approach to portable on-tology specifications. ... [9] H... more ... [6] Gruber, TR (1993), A translation approach to portable on-tology specifications. ... [9] Hondjack, D. (2007), Explicitation de la s`emantique dans des bases de donnes `a base ontologieque et le modle Ontodb, Ph.D. Thesis, LISI/ENSMA et Universit`e de Poitiers. ...
The problem of knowledge heterogeneity in the Semantic Web or in the context of information syste... more The problem of knowledge heterogeneity in the Semantic Web or in the context of information systems remains a major challenge for the scientific community, in particular when several ontologies developed independently and separately have to be exploited to exchange their knowledge. Several works have addressed the semantic heterogeneity issue in ontologies and proposed to align them with additional knowledge. Recently a formalism taking into account the challenge of applied techniques to represent and reason on aligned ontologies was proposed by the authors. The authors proposed a contribution that can be seen as an extension of existing work on the heterogeneous ontologies integration. This formalism allows dealing with contextual representation and reasoning where ontologies and alignments by pairs of ontologies are developed in different and incompatible context. In this paper, some aspects of multi-level networked knowledge are recalled, detailing its semantics and discussing the comparison of the two semantics, DL-approach and DDL-approach, according to certain criteria, in order to measure their relevance and to give to readers a way to choose one semantics rather than another according to the context or the intended application.
2013 5th International Conference on Computer Science and Information Technology, 2013
ABSTRACT Integrated Distributed Description Logics (IDDL) offers the possibility to describe sema... more ABSTRACT Integrated Distributed Description Logics (IDDL) offers the possibility to describe semantic relations that exist between two ontologies in a networked-based system. However, in order to improve the expressivity of a distributed system, networked ontologies with context rules need to be integrated. OWL2Jess is a hybrid reasoning framework; that may be used to ensure the connection between OWL (Ontology Web Language) and JESS (Java Expert System Shell) in order to allow rules based reasoning on the ontology. It permits the conversion of OWL ontology code into Jess facts. Semantic pre-defined rules are used to encode the semantic of RDF (Resource Description Framework) and OWL, to check the consistency and compute the taxonomic classification. In this paper, pre-defined semantic rules by inserting IDDL inferences rules are extended and reused. The paper presents an approach to rule-based ontologies integration. It basically extends OWL2Jess/SWRL2Jess by rules borrowed from “Integrated Distributed Description Logic”. Further, it argues how the presented approach can be used to infer more information given axioms of local ontologies as well as axioms in the integrated ontologies. It provides also services of check local and global consistency of integrated OWL ontologies with alignments and context rules.
This paper describes a new formalism based on multi-level networked knowledge (MLNK), a combinati... more This paper describes a new formalism based on multi-level networked knowledge (MLNK), a combination of different ontologies describing heterogeneous and complementary domains aligned with semantic correspondences. Ontology alignments make explicit the correspondences between terms from different ontologies and must be taken into account in reasoning, where two explicit form of correspondences are given: mappings represent predefined relations such as subsumption, equivalence, or disjointness, that have a fixed semantics in all interpretations; as well as links that can relate complementary ontologies by introducing terms defined by experts, and their semantics varies according to interpretations. The proposed MLNK formalism can be transformed into a Distributed System capable of supporting DDL semantics. It permits to apply a contextual reasoning where ontologies and alignments by pairs of ontologies are developed in different and incompatible contexts. The semantic of the proposed formalism is extensively described along with an illustrative example.
International Journal of Metadata, Semantics and Ontologies, 2016
Integrating pre-existing, heterogeneous, and complementary ontologies, and exploiting them jointl... more Integrating pre-existing, heterogeneous, and complementary ontologies, and exploiting them jointly in reasoning remains a major challenge. Ontology alignments make explicit the correspondences between terms from different ontologies and must be taken into account in reasoning. Two forms of correspondences can be introduced: mappings represent predefined relations such as subsumption, equivalence, or disjointness, that have a fixed semantics in all interpretations; links can relate complementary ontologies by introducing terms defined by experts, and their semantics varies according to interpretations. Different experts can introduce different terms according to their points of view, which brings semantically heterogeneous links. Thus, integrating pre-existing networks of aligned ontologies requires aligning terminologies from different alignments, so as to form higher level alignments. This generates networked knowledge that can in turn be aligned with other networked knowledge. As a resultn we talk of multi-level networked knowledge, a concept that we formalise here and for which we propose a possible formal semantic for automating reasoning tasks. This semantic consists in reducing reasoning on networked knowledge to reasoning over DL formalisms for which we have reasoning procedures. The proposed approach is implemented and tested in order to compare results, for different networks.
2009 International Conference on Multimedia Computing and Systems, 2009
Abstract This paper describes the design of a fault diagnostic maintenance system for steam turbi... more Abstract This paper describes the design of a fault diagnostic maintenance system for steam turbines based on a domain ontology of the turbine and coupled to an expert system. The main data and information constituting the system come from disparate data bases with ...
2010 International Conference on Machine and Web Intelligence, 2010
... [6] Gruber, TR (1993), A translation approach to portable on-tology specifications. ... [9] H... more ... [6] Gruber, TR (1993), A translation approach to portable on-tology specifications. ... [9] Hondjack, D. (2007), Explicitation de la s`emantique dans des bases de donnes `a base ontologieque et le modle Ontodb, Ph.D. Thesis, LISI/ENSMA et Universit`e de Poitiers. ...
Uploads
Papers by sousou kali