We present Ontop, an open-source Ontology-Based Data Access (OBDA) system that allows
for querying relational data sources through a conceptual representation of the domain of …

The recently introduced series of description logics under the common monikerDL-Lite'has
attracted attention of the description logic and semantic web communities due to the low …

Relational databases are considered one of the most popular storage solutions for various
kinds of data and they have been recognized as a key factor in generating huge amounts of …

Ontologies provide a conceptualization of a domain of interest. Nowadays, they are typically
represented in terms of Description Logics (DLs), and are seen as the key technology used …

Databases and related information systems can benefit from the use of ontologies to enrich
the data with general background knowledge. The DL-Lite family of ontology languages was …

The use of ontologies for accessing data is one of the most exciting new applications of
description logics in databases and other information systems. A realistic way of realising …

We develop a formal framework for comparing different versions of ontologies, and apply it
to ontologies formulated in terms of DL-Lite, a family of 'lightweight'description logics …

The combination of sensor networks with the Web, web services and database technologies,
was named some years ago as the Sensor Web or the Sensor Internet. Most efforts in this …

Studies aimed at ensuring semantic access to databases have a long history and originated
at early stages of database technology development. Unfortunately, they have not led yet to …

This article gives an overview of recent efforts focusing on integrating heterogeneous data
using Knowledge Graphs. I introduce a pipeline consisting of five steps to integrate semi …