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Ontologies in Support of Problem Solving

by Monica Crubézy, Mark A. Musen - HANDBOOK ON ONTOLOGIES , 2003
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Abstract - Cited by 37 (3 self) - Add to MetaCart
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Collaborative knowledge capture in ontologies

by Pat Hayes, Thomas C, Eskridge Raul Saavedra - In Proceedings of the 3rd International Conference on Knowledge Capture , 2005
"... This paper describes a new environment, COE, for capturing and formally representing expert knowledge for use in the Semantic Web. COE exploits the ease of use and rapid knowledge construction capabilities of the CmapTools concept mapping system and extends them to support the import and export of f ..."
Abstract - Cited by 34 (1 self) - Add to MetaCart
This paper describes a new environment, COE, for capturing and formally representing expert knowledge for use in the Semantic Web. COE exploits the ease of use and rapid knowledge construction capabilities of the CmapTools concept mapping system and extends them to support the import and export of formal, machine-interpretable knowledge representations, such as OWL, across multiple ontologies. Pragati’s Expozé tool suite complements COE’s ontology construction, browsing and navigation features by providing cluster-based search capabilities that expose existing reusable concepts relevant to the user’s focus of attention.
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Improving the design of intelligent acquisition interfaces for collecting world knowledge from web contributors

by Timothy Chklovski - In K-CAP ’05: Proceedings of the 3rd international conference on Knowledge capture , 2005
"... An emerging approach to knowledge acquisition is to collect statements from volunteer contributors over the Web. In this approach, the design of the acquisition interface is key to focusing on statements of interest, avoiding spurious entries, retaining the contributors, etc. Several such volunteer- ..."
Abstract - Cited by 27 (1 self) - Add to MetaCart
An emerging approach to knowledge acquisition is to collect statements from volunteer contributors over the Web. In this approach, the design of the acquisition interface is key to focusing on statements of interest, avoiding spurious entries, retaining the contributors, etc. Several such volunteer-contribution-based systems have been deployed to date, each with its own idiosyncratic interface. This paper discusses some key challenges faced by volunteer collection interfaces, and outlines the design features that we have found effective in addressing some aspects of those challenges. The paper discusses how these features have been implemented in deployed collection systems, and reflects on the data collected to extract lessons for future work in this research area.
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Description of an instructional ontology and its application in web services for education

by Carsten Ullrich , 2004
"... In the last years, important steps have been under-taken to bring the e-learning web to its full poten-tial. In this paper, I describe an ontology that can serve as a further step in this direction. The ontol-ogy captures the instructional function of a learn-ing resource, in other words, its “essen ..."
Abstract - Cited by 22 (4 self) - Add to MetaCart
In the last years, important steps have been under-taken to bring the e-learning web to its full poten-tial. In this paper, I describe an ontology that can serve as a further step in this direction. The ontol-ogy captures the instructional function of a learn-ing resource, in other words, its “essence ” from a teaching/learning perspective, an aspect not yet covered by learning object metadata standards. It offers the well-known advantages of ontologies: it can provide humans with a shared vocabulary and can serve as the basis for the semantic interoper-ability for machines. The article motivates the need for such an ontology and describes several educa-tional Web services that can benefit from it. To exemplify the generality of the ontology, the arti-cle describes how the ontology can be mapped onto several knowledge representations currently used in e-learning systems.

Incremental formalization of document annotations through ontology-based paraphrasing

by Jim Blythe, A Gil - Proceedings of the13 th International World Wide Web Conference , 2004
"... For the manual semantic markup of documents to become widespread, users must be able to express annotations that conform to ontologies (or schemas) that have shared meaning. However, a typical user is unlikely to be familiar with the details of the terms as defined by the ontology authors. In additi ..."
Abstract - Cited by 22 (3 self) - Add to MetaCart
For the manual semantic markup of documents to become widespread, users must be able to express annotations that conform to ontologies (or schemas) that have shared meaning. However, a typical user is unlikely to be familiar with the details of the terms as defined by the ontology authors. In addition, the idea to be expressed may not fit perfectly within a pre-defined ontology. The ideal tool should help users find a partial formalization that closely follows the ontology where possible but deviates from the formal representation where needed. We describe an implemented approach to help users create semi-structured semantic annotations for a document according to an extensible OWL ontology. In our approach, users enter a short sentence in free text to describe all or part of a document, and the system presents a set of potential paraphrases of the sentence that are generated from valid expressions in the ontology, from which the user chooses the closest match. We use a combination of off-the-shelf parsing tools and breadth-first search of expressions in the ontology to help users create valid annotations starting from free text. The user can also define new terms to augment the ontology, so the potential matches can improve over time.

Realizing ontology based data access: A plug-in for protégé

by Mariano Rodriguez-muro, Lina Lubyte, Diego Calvanese - In Proc. of the Workshop on Information Integration Methods, Architectures, and Systems (IIMAS 2008 , 2008
"... Abstract — In Ontology-Based Data Access (OBDA), the aim is to use an ontology to mediate the access to data sources. We present a plug-in for the standard ontology editor Protégé that allows users to model ontologies with mappings to data sources in order to perform OBDA. We argue that our plug-in, ..."
Abstract - Cited by 20 (8 self) - Add to MetaCart
Abstract — In Ontology-Based Data Access (OBDA), the aim is to use an ontology to mediate the access to data sources. We present a plug-in for the standard ontology editor Protégé that allows users to model ontologies with mappings to data sources in order to perform OBDA. We argue that our plug-in, together with an OBDA-Enabled reasoner, allows users to build, test, and deploy OBDA Systems in academic or industrial settings. I.
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An ontology-based hierarchical peer-to-peer global service discovery system.

by Knarig Arabshian , Henning Schulzrinne - Journal of Ubiquitous Computing and Intelligence (JUCI) , 2005
"... Abstract-Current service discovery systems fail to span across the globe and they use simple attribute-value pair or interface matching for service description and querying. We propose a global service discovery system, GloServ, that uses the Web Ontology Language (OWL) for service classification a ..."
Abstract - Cited by 18 (2 self) - Add to MetaCart
Abstract-Current service discovery systems fail to span across the globe and they use simple attribute-value pair or interface matching for service description and querying. We propose a global service discovery system, GloServ, that uses the Web Ontology Language (OWL) for service classification and the dynamic formation of the network architecture. The GloServ architecture spans both local and wide area networks. It maps knowledge obtained by the service classification ontology to a structured peer-to-peer network such as a Content Addressable Network (CAN). GloServ also performs automated and intelligent registration and querying by exploiting the logical relationships within the service ontologies.
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SAWA: An assistant for higher-level fusion and situation awareness, in:

by Christopher J Matheus , Mieczyslaw M Kokar , Kenneth Baclawski , Jerzy A Letkowski , Catherine Call , Michael Hinman , John Salerno , Douglas Boulware - Proc. of SPIE Conf. on Multisensor, Multisource Information Fusion: Arch., Algorithms, and App., , 2005
"... ABSTRACT Situation awareness involves the identification and monitoring of relationships among level-one objects. This problem in general is intractable (i.e., there is a potentially infinite number of relations that could be tracked) and thus requires additional constraints and guidance defined by ..."
Abstract - Cited by 18 (0 self) - Add to MetaCart
ABSTRACT Situation awareness involves the identification and monitoring of relationships among level-one objects. This problem in general is intractable (i.e., there is a potentially infinite number of relations that could be tracked) and thus requires additional constraints and guidance defined by the user if there is to be any hope of creating practical situation awareness systems. This paper describes a Situation Awareness Assistant (SAWA) that facilitates the development of user-defined domain knowledge in the form of formal ontologies and rule sets and then permits the application of the domain knowledge to the monitoring of relevant relations as they occur in evolving situations. SAWA includes tools for developing ontologies in OWL and rules in SWRL and provides runtime components for collecting event data, storing and querying the data, monitoring relevant relations and viewing the results through a graphical user interface. An application of SAWA to a scenario from the domain of supply logistics is also presented.

Hybrid context modelling: A location-based scheme using ontologies

by Ioanna Roussaki, Maria Strimpakou, Carsten Pils, Nikos Kalatzis, Miltos Anagnostou - Proceedings of the Fourth Annual IEEE International Conference on Pervasive Computing and Communications Workshops (PERCOMW’06 , 2006
"... Context awareness is an inherent feature of pervasive computing. It enhances the proactiveness of the system thus requiring less user attention and fewer human-machine interactions, it supports intelligent personalization features, and it can assist the system to address the user requirements consid ..."
Abstract - Cited by 18 (2 self) - Add to MetaCart
Context awareness is an inherent feature of pervasive computing. It enhances the proactiveness of the system thus requiring less user attention and fewer human-machine interactions, it supports intelligent personalization features, and it can assist the system to address the user requirements considering the current conditions. Nevertheless, in such environments, various types of context information are involved and need to be efficiently managed and maintained, soundly interpreted, rapidly processed, and securely disseminated by the system. Thus, an interoperable and flexible context representation scheme is necessary that will support efficient context interpretation and reasoning and will perform well in distributed large-scale context-aware systems. This paper is concerned with the development of a hybrid context representation scheme 1 that aims to combine the maintenance, distribution and administrative facilities of a location-based context model and the semantic advantages of context ontologies. 1.
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Supporting Collaborative Ontology Development

by Tania Tudorache, Natalya F. Noy, Samson Tu, Mark A. Musen - in Protégé,” in ISWC2008, ser. LNCS , 2008
"... Abstract. Ontologies are becoming so large in their coverage that no single person or a small group of people can develop them effectively and ontology development becomes a community-based enterprise. In this paper, we discuss requirements for supporting collaborative ontology development and prese ..."
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Abstract. Ontologies are becoming so large in their coverage that no single person or a small group of people can develop them effectively and ontology development becomes a community-based enterprise. In this paper, we discuss requirements for supporting collaborative ontology development and present Collaborative Protégé—a tool that supports many of these requirements, such as discussions integrated with ontology-editing process, chats, and annotations of changes and ontology components. We have evaluated Collaborative Protégé in the context of ontology development in an ongoing large-scale biomedical project that actively uses ontologies at the VA Palo Alto Healthcare System. Users have found the new tool effective as an environment for carrying out discussions and for recording references for the information sources and design rationale. 1 Ontology Development Becomes Collaborative Recent developments are dramatically changing the way that scientists are building ontologies. First, as ontologies are becoming commonplace within many scientific domains, such as biomedicine, they are being developed collaboratively by increasingly
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