Vassilis Papakonstantinou

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The Resource Description Framework (RDF) has become the defacto standard for representing information in the Semantic Web. Given the increasing amount of sensitive RDF data available on the Web, it becomes increasingly critical to guarantee secure access to this content. In this paper we advocate the use of an <i>abstract access control model</i> to ensure(More)
As LOD datasets are constantly evolving, both at schema and instance level, there is a need for systems that support efficiently storing and querying such evolving data. The aim of this paper is to describe the way that such RDF archiving systems could be evaluated by presenting the different benchmarks in the literature, as long as the state-of-the-art(More)
The Linked Data paradigm which is now the prominent en-abler for sharing huge volumes of data by means of Semantic Web technologies , has created novel challenges for non-relational data management technologies such as RDF and graph database systems. Bench-marking, which is an important factor in the development of research on RDF and graph data management(More)
Given the increasing amount of sensitive RDF data available on the Web, it becomes critical to guarantee secure access to this content. The problem becomes even more challenging in the presence of RDFS inference , where inferred knowledge needs to be protected in the same way as explicit one. State of the art models for RDF access control annotate triples(More)
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