Results 1 - 9 of 9

Querying rdf data from a graph database perspective

by Renzo Angles, Claudio Gutierrez - In Proceedings of the Second European Semantic Web Conference , 2005
"... Abstract. This paper studies the RDF model from a database perspective. From this point of view it is compared with other database models, particularly with graph database models, which are very close in motivations and use cases to RDF. We concentrate on query languages, analyze current RDF trends, ..."
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Abstract. This paper studies the RDF model from a database perspective. From this point of view it is compared with other database models, particularly with graph database models, which are very close in motivations and use cases to RDF. We concentrate on query languages, analyze current RDF trends, and propose the incorporation to RDF query languages of primitives which are not present today, based on the experience and techniques of graph database research. 1
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RDF Query Languages Need Support for Graph Properties

by Renzo Angles, Claudio Gutierrez, Jonathan Hayes , 2004
"... This short paper discusses the need to include into RDF query languages the ability to directly query graph properties from RDF data. We study the support that current RDF query languages give to these features, to conclude that they are currently not supported. We propose a set of basic graph p ..."
Abstract - Cited by 6 (1 self) - Add to MetaCart
This short paper discusses the need to include into RDF query languages the ability to directly query graph properties from RDF data. We study the support that current RDF query languages give to these features, to conclude that they are currently not supported. We propose a set of basic graph properties that should be added to RDF query languages and provide evidence for this view.
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R.: Building a semantic intraweb with rhizomer and a wiki

by Roberto García, Rosa Gil - In: IntraWebs Workshop, 15th World Wide Web Conference , 2006
"... IntraWebs enjoy the same technological facilities that have made the World Wide Web a success. Conversely, they can experience the same inconveniences derived from this success. Our proposal is to apply the same solutions that are being proposed in the Web context to manage huge information spaces, ..."
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IntraWebs enjoy the same technological facilities that have made the World Wide Web a success. Conversely, they can experience the same inconveniences derived from this success. Our proposal is to apply the same solutions that are being proposed in the Web context to manage huge information spaces, Semantic Web technologies. Rhizomer is a semantic metadata browsing and management component that is combined with a wiki engine in order to build Semantic Web portals. When they are combined with access control mechanisms, the resulting semantic portal can be scaled down to build a restricted access semantic intraweb. In other words, we get an easy to use HTML based solution that integrates three main components. First, there is an online content management system based on wiki. Second, a user friendly semantic metadata for searching, browsing and editing. And third, access control mechanism that allow implementing content workflows within different private publishing spaces or the public one, as it has been tested in the Rhizomik intraweb for a research community.
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Exploration and Visualization in the Web of Big Linked Data: A Survey of the State of the Art

by Nikos Bikakis, Timos Sellis
"... Data exploration and visualization systems are of great importance in the Big Data era. Exploring and visualizing very large datasets has become a major research challenge, of which scalability is a vital requirement. In this survey, we describe the major prerequi-sites and challenges that should be ..."
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Data exploration and visualization systems are of great importance in the Big Data era. Exploring and visualizing very large datasets has become a major research challenge, of which scalability is a vital requirement. In this survey, we describe the major prerequi-sites and challenges that should be addressed by the modern ex-ploration and visualization systems. Considering these challenges, we present how state-of-the-art approaches from the Database and Information Visualization communities attempt to handle them. Fi-nally, we survey the systems developed by Semantic Web commu-nity in the context of the Web of Linked Data, and discuss to which extent these satisfy the contemporary requirements. Keywords Visual analytics, big data challenges, data exploration, large databases,
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Navigation in RDF data

by unknown authors
"... There are already several tools available that are capa-ble of visualizing RDF data. The problem with RDF data is that they tend to be very large. To handle the data, the vi-sualizers cannot display the whole data but rather need to use some kind of navigation. This paper describes our ap-proach to ..."
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There are already several tools available that are capa-ble of visualizing RDF data. The problem with RDF data is that they tend to be very large. To handle the data, the vi-sualizers cannot display the whole data but rather need to use some kind of navigation. This paper describes our ap-proach to the navigation, which was designed specifically with the preservation of the user’s mental map in mind. We also compare our approach to the other visualizers. 1
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Common Sense Design: Aided Visualisation of the Semantic Web

by Gus Gollings
"... Abstract. This paper provides an outline for a general purpose Semantic Web browser which aims to provide a sensible visualisation for any RDF data. Sketched here is a web proxy for common browsers which interlopes on RDF/XML transmissions, transforming them at ‘diplaytime’ to provide the viewer wit ..."
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Abstract. This paper provides an outline for a general purpose Semantic Web browser which aims to provide a sensible visualisation for any RDF data. Sketched here is a web proxy for common browsers which interlopes on RDF/XML transmissions, transforming them at ‘diplaytime’ to provide the viewer with a meaningful view on the intercepted model. It suggests using the Wikipedia-style million minds approach to developing two large repositories, one of common sense knowledge about design principles, and another of design templates using the Fresnel pattern. An ‘intelligent ’ agent could make use of these two repositories, as well as personalisation information and RDF introspection, in the rendering of useful interpretations of raw RDF material. 1
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The Rhizomer Experience

by unknown authors
"... Abstract—Rhizomer is a generic semantic metadata browser and editor. It is based on “classic ” HTML paradigms (table, form, etc.) in order to provide an easy and accessible user experience. For end-users, it looks like the web pages they are used to deal with. However, the semantics that lay behind ..."
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Abstract—Rhizomer is a generic semantic metadata browser and editor. It is based on “classic ” HTML paradigms (table, form, etc.) in order to provide an easy and accessible user experience. For end-users, it looks like the web pages they are used to deal with. However, the semantics that lay behind are used to improve the user experience through an AJAX-enhanced web interface. The user interface is fed by a metadata storage abstraction layer, which offers a SPARQL endpoint and implements the DESCRIBE SPARQL primitive in order to improve the usability of the resulting metadata fragments. The metadata component is combined with a wiki engine that helps managing the content intended for human consumption. Altogether, both components build a simple yet powerful platform for Semantic Web portals. Index Terms — human factors, Semantic Web, user interfaces, web portal
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IOS Press Hierarchical Visual Exploration and Analysis on the Web of Data

by Nikos Bikakis A, George Papastefanatos B, Melina Skourla A, Timos Sellis C
"... Abstract. The purpose of data visualization is to offer intuitive ways for information perception and manipulation, especially for non-expert users. The Web of Data has realized the availability of a huge amount and variety of datasets; most of them offer SPARQL endpoints for online access and analy ..."
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Abstract. The purpose of data visualization is to offer intuitive ways for information perception and manipulation, especially for non-expert users. The Web of Data has realized the availability of a huge amount and variety of datasets; most of them offer SPARQL endpoints for online access and analysis. However, most traditional visualization tools and methods operate on an offline way without offering the ability for ad hoc visualization and analysis of large dynamic sets of data. In this work, we present a model for building, visualizing, and interacting with hierarchically organized Linked Data (LD). Our model is build on top of a lightweight tree-based structure which can be easily constructed on-the-fly for a given set of data. This tree structure organizes input data objects into a hierarchical model based on the values of their properties that they exhibit. Additionally, we define two versions of this structure, which adopts different data organization approaches, well-suited to visual exploration and analysis context. Furthermore, statistical computations can be efficiently performed on-the-fly in the proposed structure. The presented model is realized in a web-based prototype tool, called rdf:SynopsViz that offers hierarchical visual exploration and analysis over LD datasets. Finally, we provide an evaluation of our approach employing LD datasets.
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Balloon Synopsis: A jQuery plugin to easily integrate the Semantic Web in a website?

by Kai Schlegel, Thomas Weißgerber, Florian Stegmaier, Michael Granitzer, Harald Kosch
"... Abstract. The Semantic Web grows constantly and promises a huge amount of machine-interpretable information. Unfortunately, the inte-gration and usage of semantic information is not feasible by everyone. Hence, a large number of Semantic Web applications are lacking and the potential of the semantic ..."
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Abstract. The Semantic Web grows constantly and promises a huge amount of machine-interpretable information. Unfortunately, the inte-gration and usage of semantic information is not feasible by everyone. Hence, a large number of Semantic Web applications are lacking and the potential of the semantic knowledge remains unexploited. We propose balloon Synopsis, an easy-to-use jQuery plugin to integrate Semantic Web information in a website. It provides a modern visualisation and browser for RDF information including automatic remote information enhancing, similarity analysis and ontology templates. Balloon Synopsis enables web developers to rely on known tools and programming lan-guage to benefit of the global knowledge graph. 1 Easily integrate semantic information in a website The Semantic Web is evolving fast. Many different knowledge bases produce a vast amount of RDF data, leading to the initial idea of a global knowledge graph. Semantics are even an important topic for modern web developers. RDFa