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Auflistung nach Autor:in "Hartig, Olaf"

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  • Zeitschriftenartikel
    A Database Perspective on Consuming Linked Data on the Web
    (Datenbank-Spektrum: Vol. 10, No. 2, 2010) Hartig, Olaf; Langegger, Andreas
    During recent years an increasing number of data providers adopted the Linked Data principles for publishing and connecting structured data on the Web, thus creating a globally distributed dataspace—the Web of Data. While the execution of structured, SQL-like queries over this dataspace opens possibilities not conceivable before, query execution on the Web of Data poses novel challenges. These challenges provide great opportunities for the database community.In this article we introduce the concept of Linked Data and discuss different approaches to query the Web of Data. Our goal is to provide a general understanding of this new research area and of the challenges and open issues that must be addressed.
  • Zeitschriftenartikel
    An Overview on Execution Strategies for Linked Data Queries
    (Datenbank-Spektrum: Vol. 13, No. 2, 2013) Hartig, Olaf
    The publication of Linked Open Data on the Web has gained tremendous momentum over the last five years. This development makes possible (and interesting) the execution of queries using up-to-date data from multiple, automatically discovered data sources. As a result, we currently witness the emergence of a new research area that focuses on an online execution of Linked Data queries; i.e. queries that range over data that is made available using the Linked Data publishing principles.This article provides a general overview on this new area. In particular, we introduce the specific challenges that need to be addressed and then focus on possible strategies for executing Linked Data queries. Furthermore, we classify approaches proposed in the literature w.r.t. these strategies.