Data federation addresses the problem of uniformly accessing multiple, possibly
heterogeneous data sources, by mapping them into a unified schema, such as an RDF …

RDF Database Systems is a cutting-edge guide that distills everything you need to know to
effectively use or design an RDF database. This book starts with the basics of linked open …

To benefit from the Cloud platform's unlimited resources, managing and evaluating huge
volume of RDF data in a scalable manner has attracted intensive research efforts recently …

Many real-life applications require processing graph data across heterogeneous sources. In
this paper, we define the graph federation that indicates that the graph data sources are …

Linked Data (LD) is supplementing the World Wide Web of documents with a Web of data.
This is becoming apparent from the number of LD repositories available as part of the …

The success of open source software (OSS) is completely dependent on the work of
volunteers who contribute their time and talents. The submission of patches is the major way …

Answering queries over a federation of SPARQL endpoints requires combining data from
more than one data source. Optimizing queries in such scenarios is particularly challenging …

Business Intelligence (BI) tools provide fundamental support for analyzing large volumes of
information. Data Warehouses (DW) and Online Analytical Processing (OLAP) tools are …

The issue of keyword search in federated resource description framework (RDF) systems is
revisited in this paper. Numerous independent SPARQL endpoints that solely offer SPARQL …

In this paper we propose LODeX, a tool that produces a representative summary of a Linked
open Data (LOD) source starting from scratch, thus supporting users in exploring and …