This survey presents the concept of Big Data. Firstly, a definition and the features of Big Data
are given. Secondly, the different steps for Big Data data processing and the main problems …

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 …

Advances in sensor data collection technology, such as pervasive and embedded devices,
and RFID Technology have lead to a large number of smart devices which are connected to …

Despite the intense interest towards realizing the Semantic Web vision, most existing RDF
data management schemes are constrained in terms of efficiency and scalability. Still, the …

Integrated access to multiple distributed and autonomous RDF data sources is a key
challenge for many semantic web applications. As a reaction to this challenge, SPARQL, the …

Recently, the SPARQL query language for RDF has reached the W3C recommendation
status. In response to this emerging standard, the database community is currently exploring …

We study fundamental aspects related to the efficient processing of the SPARQL query
language for RDF, proposed by the W3C to encode machine-readable information in the …

In this paper, we formalize the problem of Basic Graph Pattern (BGP) optimization for
SPARQL queries and main memory graph implementations of RDF data. We define and …

The Resource Description Framework (RDF) represents a main ingredient and data
representation format for Linked Data and the Semantic Web. It supports a generic graph …

In this paper, we discuss the architecture and implementation of the Semantic Web Search
Engine (SWSE). Following traditional search engine architecture, SWSE consists of …