RDF has seen increased adoption in recent years, prompting the standardization of the
SPARQL query language for RDF, and the development of local and distributed engines for …

RDF triplestores and property graph databases are two approaches for data management
which are based on modeling, storing and querying graph-like data. In spite of such …

This paper details RDF/OWL storage and management in two popular Relational Database
Management Systems (RDBMSs): Oracle and Virtuoso. Popularity, sustainability, and …

In the past decade, property graph databases have emerged as a growing niche in data
management. Many native graph systems and query languages have been created, but the …

SPARQL query execution in state of the art RDF engines depends on, and is often limited by
the underlying storage and indexing schemes. Typically, these systems exhaustively store …

In this paper, we propose a novel data-driven schema for large-scale heterogeneous
knowledge graphs inspired by Formal Concept Analysis (FCA). We first extract the sets of …

Real-time processing of data streams emanating from sensors is becoming a common task
in Internet of Things scenarios. The key implementation goal consists in efficiently handling …

Location estimation of sensor nodes is an essential part of most applications for wireless
sensor and actor networks (WSAN). The ambiguous location information often makes the …

Abstract When publishing Linked Open Datasets on the Web, most attention is typically
directed to their latest version. Nevertheless, useful information is present in or between …

The RDF data model forms a cornerstone of the Semantic Web technology stack. Although
there have been different proposals for RDF serialization syntaxes, the underlying simple …