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Ontology Learning for the Semantic Web

by Er Maedche, Steffen Staab - IEEE Intelligent Systems , 2001
"... The Semantic Web relies heavily on the formal ontologies that structure underlying data for the purpose of comprehensive and transportable machine understanding. Therefore, the success of the Semantic Web depends strongly on the proliferation of ontologies, which requires fast and easy engineering o ..."
Abstract - Cited by 492 (16 self) - Add to MetaCart
-structured and fully structured data in order to support a semi-automatic, cooperative ontology engineering process. Our ontology learning framework proceeds through ontology import, extraction, pruning, refinement, and evaluation giving the ontology engineer a wealth of coordinated tools for ontology modeling

Enabling Knowledge Representation on the Web by Extending RDF Schema

by Jeen Broekstra, Michel Klein, Stefan Decker, Dieter Fensel, Frank van Harmelen, Ian Horrocks - WWW10 , 2001
"... Recently, there has been a wide interest in using ontologies on the Web. As a basis for this, RDF Schema (RDFS) provides means to define vocabulary, structure and constraints for expressing metadata about Web resources. However, formal semantics are not provided, and the expressivity of it is not en ..."
Abstract - Cited by 73 (16 self) - Add to MetaCart
of it is not enough for full-fledged ontological modeling and reasoning. In this paper, we will show how RDFS can be extended in such a way that a full knowledge representation (KR) language can be expressed in it, thus enriching it with the required additional expressivity and the semantics of this language. We do

Ontologies are us: A unified model of social networks and semantics

by Peter Mika - In International Semantic Web Conference , 2005
"... Abstract. On the Semantic Web ontologies are most commonly treated as artifacts created by knowledge engineers for a particular community. The task of the engineers is to forge a common understanding within the community and to formalize the agreements, prerequisites of reusing domain knowledge in i ..."
Abstract - Cited by 466 (3 self) - Add to MetaCart
Abstract. On the Semantic Web ontologies are most commonly treated as artifacts created by knowledge engineers for a particular community. The task of the engineers is to forge a common understanding within the community and to formalize the agreements, prerequisites of reusing domain knowledge

Yago: A Core of Semantic Knowledge

by Fabian M. Suchanek, Gjergji Kasneci, Gerhard Weikum - IN PROC. OF WWW ’07 , 2007
"... We present YAGO, a light-weight and extensible ontology with high coverage and quality. YAGO builds on entities and relations and currently contains roughly 900,000 entities and 5,000,000 facts. This includes the Is-A hierarchy as well as non-taxonomic relations between entities (such as hasWonPrize ..."
Abstract - Cited by 504 (66 self) - Add to MetaCart
We present YAGO, a light-weight and extensible ontology with high coverage and quality. YAGO builds on entities and relations and currently contains roughly 900,000 entities and 5,000,000 facts. This includes the Is-A hierarchy as well as non-taxonomic relations between entities (such as has

Imagenet: A large-scale hierarchical image database

by Jia Deng, Wei Dong, Richard Socher, Li-jia Li, Kai Li, Li Fei-fei - In CVPR , 2009
"... The explosion of image data on the Internet has the potential to foster more sophisticated and robust models and algorithms to index, retrieve, organize and interact with images and multimedia data. But exactly how such data can be harnessed and organized remains a critical problem. We introduce her ..."
Abstract - Cited by 840 (28 self) - Add to MetaCart
here a new database called “ImageNet”, a largescale ontology of images built upon the backbone of the WordNet structure. ImageNet aims to populate the majority of the 80,000 synsets of WordNet with an average of 500-1000 clean and full resolution images. This will result in tens of millions

The Semantic Web and its Languages

by Dieter Fensel - IEEE Intelligent Systems , 2000
"... o define arbitrary domain and task specific extensions (even HTML got redefined as an XML application, see XHTML). Therefore, it is just consequent to define the semantic web as an XML application. . The first step in this direction is taken by RDF which define a syntactical convention and a simple ..."
Abstract - Cited by 35 (0 self) - Add to MetaCart
modeling primitives on top of RDF. . A third step is taken by OIL 2 that uses RDFS as a starting point and extends it to a full-fledged ontology modeling language. OIL unifies three important aspects 1 Early steps in the direction of a semantic web where SHOE [Luke et al., 1996

Enabling knowledge representation on the Web by extending RDF Schema

by Jeen Broekstra A, Michel Klein B, Stefan Decker C, Dieter Fensel B, Frank Van Harmelen B, Ian Horrocks D
"... Recently, a widespread interest has emerged in using ontologies on the Web. Resource Description Framework Schema (RDFS) is a basic tool that enables users to define vocabulary, structure and constraints for expressing meta data about Web resources. However, it includes no provisions for formal sema ..."
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semantics, and its expressivity is not sufficient for full-fledged ontological modeling and reasoning. In this paper, we will show how RDFS can be extended to include a more expressive knowledge representation language. That, in turn, would enrich it with the required additional expressivity

Evaluating Ontological Decisions With Ontoclean

by Nicola Guarino, Christopher Welty , 2002
"... this article, is the discovery of inconsistent uses of subsumption in the taxonomy. Deciding whether one property should subsume another is one of the most important ontological decisions a modeler must make in building an ontology, and providing a formal foundation for evaluating these decisions ha ..."
Abstract - Cited by 336 (13 self) - Add to MetaCart
this article, is the discovery of inconsistent uses of subsumption in the taxonomy. Deciding whether one property should subsume another is one of the most important ontological decisions a modeler must make in building an ontology, and providing a formal foundation for evaluating these decisions

I.: Adding formal semantics to the Web: building on top of RDF Schema

by Jeen Broekstra, Michel Klein, Stefan Decker, Dieter Fensel, Ian Horrocks - In: Proc. of the ECDL 2000 Workshop on the Semantic Web (2000
"... Abstract RDF Schema provides means to define vocabulary, structure and constraints for expressing metadata about Web resources. However, formal semantics for the primitives defined in RDF Schema are not provided, and the expressivity of these primitives is not enough for full-fledged ontological mod ..."
Abstract - Cited by 24 (4 self) - Add to MetaCart
Abstract RDF Schema provides means to define vocabulary, structure and constraints for expressing metadata about Web resources. However, formal semantics for the primitives defined in RDF Schema are not provided, and the expressivity of these primitives is not enough for full-fledged ontological

Web Service Modeling Ontology

by Dumitru Roman, Uwe Keller, Holger Lausen, Jos De Bruijn, Rubén Lara, Michael Stollberg, Axel Polleres, Cristina Feier, Cristoph Bussler, Dieter Fensel - STANDARD (WSMO - STANDARD), WSMO DELIVERABLE D2 VERSION 1.0 WORKING DRAFT 29 JULY 2004. AVAILABLE: HTTP://WWW.WSMO.ORG/2004/D2/V1.0/20040729
"... The potential to achieve dynamic, scalable and cost-effective marketplaces and eCommerce solutions has driven recent research efforts towards so-called Semantic Web Services, that are enriching Web services with machine-processable semantics. To this end, the Web Service Modeling Ontology (WSMO) pro ..."
Abstract - Cited by 270 (23 self) - Add to MetaCart
The potential to achieve dynamic, scalable and cost-effective marketplaces and eCommerce solutions has driven recent research efforts towards so-called Semantic Web Services, that are enriching Web services with machine-processable semantics. To this end, the Web Service Modeling Ontology (WSMO
Results 1 - 10 of 10,050