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Datenbank Spektrum 17(2) - Juli 2017

https://dl.gi.de/handle/20.500.12116/10988
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Auflistung Datenbank Spektrum 17(2) - Juli 2017 nach Autor:in "Heuer, Andreas"

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  • Zeitschriftenartikel
    Daten wie Sand am Meer – Datenerhebung, -strukturierung, -management und Data Provenance für die Ostseeforschung
    (Datenbank-Spektrum: Vol. 17, No. 2, 2017) Bruder, Ilvio; Klettke, Meike; Möller, Mark Lukas; Meyer, Frank; Heuer, Andreas; Jürgensmann, Susanne; Feistel, Susanne
    Das Datenmanagement für heterogene Umweltdaten wird am Beispiel verschiedener Projekte aus dem maritimen Umfeld gezeigt. Besonderer Schwerpunkt dabei sind eine Pipeline zur Integration heterogener Forschungsdaten, die Nachvollziehbarkeit der Daten (Data Provenance) und die Berücksichtigung temporaler Aspekte bei der Erhebung, Speicherung und Auswertung der Daten.
  • Zeitschriftenartikel
    The Hydra.PowerGraph System
    (Datenbank-Spektrum: Vol. 17, No. 2, 2017) Meyer, Holger; Schering, Alf-Christian; Heuer, Andreas
    Directed hypergraphs are known from graph theory [11] and are well understood within their own domain [7–9, 22, 23]. This paper provides an overview on the expressiveness of directed and typed hypergraphs as a modeling paradigm not only for the content of digital libraries and archives but a variety of applications. Furthermore, hypergraphs are sufficiently expressive to provide an implementation logic for conceptual models like CIDOC/CRM [18] in the context of museum-related systems and digital archives.The directed hypergraph model supports typed nodes and individual flexible sets of attributes on a per node type basis. This allows for efficient mapping on object-relational database structures. It also features a flexible, semi-structured type system for hyperedges. The graph model is accompanied by a set of well defined graph operations forming an algebra and a descriptive hypergraph query language GrafL. This language supports typed, structure and value based queries as well as fundamental graph algorithms.The suitability of such a hypergraph-based model is illustrated with a large digital ethnological archive system, which is developed in the WossiDiA project [43, 52, 53].