RDF [1] Graph modeling is a foundational technology in the whole semantic web (SW) technology stack. Since its debut in 2004, RDF graph has enjoyed many applications in the enterprise domain. Examples of these applications include, but certainly not limited to, integration and federated query of heterogeneous data sources, flexible and extensible representation of enterprise knowledge base, adh...

In this paper, we propose a model for enabling users to search RDF data via keywords, thus, allowing them to discover relevant information without using complicated queries or knowing the underlying ontology or vocabulary. We aim at exploiting the characteristics of the RDF data to increase the quality of the ranked query results. We consider different dimensions for evaluating the value of res...

The aim of the Edutella project is to provide a peer-to-peer infrastructure for educational material retrieval using semantic web meta-data descriptions of educational resources. Edutella uses the semantic web meta-data description languages RDF and RDF-Schema for describing web resources. The aim of this work is to wrap the Edutella infrastructure with a functional mediator system. This makes ...

Resource Description Framework (RDF) is a standard for representing information that can be identified using a Universal Resource Identifier. In particular, it is intended for representing metadata about Web resources. RDF is being used in numerous application areas, including Life Sciences, Digital Libraries, and Intelligence. The RDF data structure is a directed graph or network. Current solu...

RDF has been proposed by W3C as a metadata model and language for representing information about resources in WWW. In this paper we introduce Multidimensional RDF (or MRDF), as an extension of RDF, suitable for representing context-dependent RDF data. In MRDF we have a set of dimensions whose values define different contexts (or worlds) under which different parts of an RDF graph may hold. We d...

In this paper, we will discuss the proposed recommendation (March 1999) for an RDF Schema Specification and compare the approach taken in this specification to conventional meta data models. We will point out several pecularities in the RDF schema specification compared to more conventional approaches, which are basically due to the dual role of properties such as subclass and domain both as pr...

This paper presents an abstract data model for visualizing RDF data based on the notion of nested graphs. Our study gives theoretical results that shows directions to enhance the representation and visualization of RDF data.

One of the main features of the RDF data model is its ability for modeling highly interconnected data in an extensible way. In this sense, given the graph-like nature of RDF, browsing RDF data arises as a natural requirement. At the moment, there are many applications for browsing RDF, for example Palm-DAML, RDF Author, IsaViz, CS-Aktive, mSpace, BrownSauce, DAM viewer. These applications, comm...

The Resource Description Framework (RDF) is intended to be used to capture and express the conceptual structure of information offered in the Web. Interoperability is considered to be an important enabler of future web applications. While XML supports syntactic interoperability, RDF is aimed at semantic interoperability. Interoperability is only given if different users/agents interpret an RDF ...