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 …

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 …

Indexes are models: a\btree-Index can be seen as a model to map a key to the position of a
record within a sorted array, a Hash-Index as a model to map a key to a position of a record …

Recent advances in information extraction have led to huge knowledge bases (KBs), which
capture knowledge in a machine-readable format. Inductive Logic Programming (ILP) can …

In pursuit of graph processing performance, the systems community has largely abandoned
general-purpose distributed dataflow frameworks in favor of specialized graph processing …

The first edition of this book appeared in 1991 when the technology was new and there were
not too many products. In the Preface to the first edition, we had quoted Michael Stonebraker …

Index structures are one of the most important tools that DBAs leverage to improve the
performance of analytics and transactional workloads. However, building several indexes …

RDF is a data model for schema-free structured information that is gaining momentum in the
context of Semantic-Web data, life sciences, and also Web 2.0 platforms. The “pay-as-you …

Much work has been devoted to supporting RDF data. But state-of-the-art systems and
methods still cannot handle web scale RDF data effectively. Furthermore, many useful and …

The current Web of Data is producing increasingly large RDF datasets. Massive publication
efforts of RDF data driven by initiatives like the Linked Open Data movement, and the need …