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Semantic Web

About: Semantic Web is a research topic. Over the lifetime, 26987 publications have been published within this topic receiving 534275 citations. The topic is also known as: Sem Web & SemWeb.


Papers
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01 Sep 2000
TL;DR: A layered approach to interoperability of information models that borrows from layered software structuring techniques used in today's internetworking is suggested and the key features of the object layer like identity and binary relationships, basic typing, reification, ordering, and n-ary relationships are suggested.
Abstract: On the Semantic Web, the target audience is the machinesr ather than humans. To satisfy the demands of this audience, information needs to be available in machine-processable form rather than as unstructured text. A variety of information models like RDF or UML are available to fulfil this purpose, varying greatly in their capabilities. The advent of XML leveraged a promising consensus on the encoding syntax for machine-processable information. However, interoperating between different information models on a syntactic level proved to be a laborious task. In this paper, we suggest a layered approach to interoperability of information models that borrows from layered software structuring techniques used in today's internetworking. We identify the object layer that fills the gap between the syntax and semantic layers and examine it in detail. We suggest the key features of the object layer like identity and binary relationships, basic typing, reification, ordering, and n-ary relationships. Finally, we examine design issues and implementation alternatives involved in building the object layer.

101 citations

Journal ArticleDOI
TL;DR: In this article, the authors describe their ITtalks system and discuss how Semantic Web concepts and DAML+OIL extend its ability to provide an intelligent online service, which will improve the automated gathering and processing of information and help integrate multiagent systems with the existing information infrastructure.
Abstract: Semantic Web markup languages will improve the automated gathering and processing of information and help integrate multiagent systems with the existing information infrastructure. The authors, describe their ITtalks system and discuss how Semantic Web concepts and DAML+OIL extend its ability to provide an intelligent online service.

101 citations

Journal ArticleDOI
TL;DR: This paper describes how the use of NeXML by the TreeBASE and Phenoscape projects satisfies user needs that cannot be satisfied with other available file formats, and proposes an XML standard that supports exchange of richly annotated comparative data that is both flexible and rigorous.
Abstract: In scientific research, integration and synthesis require a common understanding of where data come from, how much they can be trusted, and what they may be used for. To make such an understanding computer-accessible requires standards for exchanging richly annotated data. The challenges of conveying reusable data are particularly acute in regard to evolutionary comparative analysis, which comprises an ever-expanding list of data types, methods, research aims, and subdisciplines. To facilitate interoperability in evolutionary comparative analysis, we present NeXML, an XML standard (inspired by the current standard, NEXUS) that supports exchange of richly annotated comparative data. NeXML defines syntax for operational taxonomic units, character-state matrices, and phylogenetic trees and networks. Documents can be validated unambiguously. Importantly, any data element can be annotated, to an arbitrary degree of richness, using a system that is both flexible and rigorous. We describe how the use of NeXML by the TreeBASE and Phenoscape projects satisfies user needs that cannot be satisfied with other available file formats. By relying on XML Schema Definition, the design of NeXML facilitates the development and deployment of software for processing, transforming, and querying documents. The adoption of NeXML for practical use is facilitated by the availability of (1) an online manual with code samples and a reference to all defined elements and attributes, (2) programming toolkits in most of the languages used commonly in evolutionary informatics, and (3) input-output support in several widely used software applications. An active, open, community-based development process enables future revision and expansion of NeXML. (Data standards; evolutionary informatics; interoperability; phyloinformatics; semantic web; syntax format.)

101 citations

Journal ArticleDOI
TL;DR: A novel and extensible model balancing the new dimension of semantic quality (as a functional quality metric) with a QoS metric is proposed, and it is demonstrated the utility of Genetic Algorithms to allow optimization within the context of a large number of services foreseen by the “Web of Services” vision.
Abstract: Ranking and optimization of web service compositions represent challenging areas of research with significant implications for the realization of the “Web of Services” vision. “Semantic web services” use formal semantic descriptions of web service functionality and interface to enable automated reasoning over web service compositions. To judge the quality of the overall composition, for example, we can start by calculating the semantic similarities between outputs and inputs of connected constituent services, and aggregate these values into a measure of semantic quality for the composition. This paper takes a specific interest in combining semantic and nonfunctional criteria such as quality of service (QoS) to evaluate quality in web services composition. It proposes a novel and extensible model balancing the new dimension of semantic quality (as a functional quality metric) with a QoS metric, and using them together as ranking and optimization criteria. It also demonstrates the utility of Genetic Algorithms to allow optimization within the context of a large number of services foreseen by the “Web of Services” vision. We test the performance of the overall approach using a set of simulation experiments, and discuss its advantages and weaknesses.

101 citations

Book
23 Nov 2004
TL;DR: This book discusses the theory and application of Ontology Translation Approaches for Interoperability, and the development of Semantic Web Services and Problem Solving Methods.
Abstract: Ontologies: Mappings and Translation.- The Theory of Top-Level Ontological Mappings and Its Application to Clinical Trial Protocols.- Generating and Integrating Evidence for Ontology Mappings.- Ontology Translation Approaches for Interoperability: A Case Study with Protege-2000 and WebODE.- Ontologies: Problems and Applications.- On the Foundations of UML as an Ontology Representation Language.- OWL Pizzas: Practical Experience of Teaching OWL-DL: Common Errors & Common Patterns.- Using a Novel ORM-Based Ontology Modelling Method to Build an Experimental Innovation Router.- Ontology-Based Functional-Knowledge Modeling Methodology and Its Deployment.- Ontologies: Trust and E-learning.- Accuracy of Metrics for Inferring Trust and Reputation in Semantic Web-Based Social Networks.- Semantic Webs for Learning: A Vision and Its Realization.- Ontology Maintenance.- Enhancing Ontological Knowledge Through Ontology Population and Enrichment.- Refactoring Methods for Knowledge Bases.- Applications to Medicine.- Managing Patient Record Instances Using DL-Enabled Formal Concept Analysis.- Medical Ontology and Virtual Staff for a Health Network.- Portals.- A Semantic Portal for the International Affairs Sector.- OntoWeaver-S: Supporting the Design of Knowledge Portals.- Knowledge Acquisition.- Graph-Based Acquisition of Expressive Knowledge.- Incremental Knowledge Acquisition for Improving Probabilistic Search Algorithms.- Parallel Knowledge Base Development by Subject Matter Experts.- Designing a Procedure for the Acquisition of Probability Constraints for Bayesian Networks.- Invented Predicates to Reduce Knowledge Acquisition.- Web Services and Problem Solving Methods.- Extending Semantic-Based Matchmaking via Concept Abduction and Contraction.- Configuration of Web Services as Parametric Design.- Knowledge Modelling for Deductive Web Mining.- On the Knowledge Level of an On-line Shop Assistant.- A Customer Notification Agent for Financial Overdrawn Using Semantic Web Services.- Aggregating Web Services with Active Invocation and Ensembles of String Distance Metrics.- Search, Browsing and Knowledge Acquisition.- KATS: A Knowledge Acquisition Tool Based on Electronic Document Processing.- SERSE: Searching for Digital Content in Esperonto.- A Topic-Based Browser for Large Online Resources.- Knowledge Formulation for AI Planning.- Short Papers.- ConEditor: Tool to Input and Maintain Constraints.- Adaptive Link Services for the Semantic Web.- Using Case-Based Reasoning to Support Operational Knowledge Management.- A Hybrid Algorithm for Alignment of Concept Hierarchies.- Cultural Heritage Information on the Semantic Web.- Stepper: Annotation and Interactive Stepwise Transformation for Knowledge-Rich Documents.- Knowledge Management and Interactive Learning.- Ontology-Based Semantic Annotations for Biochip Domain.- Toward a Library of Problem-Solving Methods on the Internet.- Supporting Collaboration Through Semantic-Based Workflow and Constraint Solving.- Towards a Knowledge-Aware Office Environment.- Computing Similarity Between XML Documents for XML Mining.- A CBR Driven Genetic Algorithm for Microcalcification Cluster Detection.- Ontology Enrichment Evaluation.- KAFTIE: A New KA Framework for Building Sophisticated Information Extraction Systems.- From Text to Ontology: The Modelling of Economics Events.- Discovering Conceptual Web-Knowledge in Web Documents.- Knowledge Mediation: A Procedure for the Cooperative Construction of Domain Ontologies.- A Framework to Improve Semantic Web Services Discovery and Integration in an E-Gov Knowledge Network.- Knowledge Organisation and Information Retrieval with Galois Lattices.- Acquisition of Causal and Temporal Knowledge in Medical Domains. A Web-Based Approach.

101 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023116
2022348
2021412
2020612
2019782
2018881