Are Dag Gulbrandsen

• Gulbrandsen, Are Dag (2006). Conceptual Modeling of Topic Maps with ORM Versus UML. Lecture Notes in Computer Science (LNCS). ISSN 0302-9743. 3873, p. 93–106. doi: 10.1007/11676904_8. Full text in Research Archive Show summary

  The paper aims to discuss strengths and weaknesses of using Object Role Modeling (ORM) and UML Class Diagrams for conceptual modeling of Topic Maps. Established evaluation criteria for conceptual modeling languages are used to compare Topic Map ontology modeling with ORM and UML, to try to find if ORM is a good alternative to UML. The paper discusses a few extensions to simplify viewing ORM diagrams of a Topic Map ontology. ORM is also used to model a case ontology to show practical use within an application domain.

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• Knutsen, Unni & Gulbrandsen, Are Dag (2014). På randen av mapping. Skriftserien Bibliotheca Nova. ISSN 1894-1427. p. 36–46. Full text in Research Archive
• Gulbrandsen, Are Dag (2005). Conceptual Modelling of Topic Maps with ORM versus UML. Full text in Research Archive
• Knutsen, Unni; Seland, Grete; Heggø, Dan Michael Olsen & Gulbrandsen, Are Dag (2015). På vei mot en generell norsk tesaurus? : delprosjekt Metodikk for mapping av Humord mot WebDewey : Rapport. Universitetsbiblioteket i Oslo. Full text in Research Archive
• Knutsen, Unni; Pharo, Nils & Gulbrandsen, Are Dag (2012). Autoritetsregister og ID for verk : fra Kallimakhos til realisering av FRBR og Lenkede data. OsloMet - storbyuniversitetet. Full text in Research Archive Show summary

  The master thesis explores the role of the work in a bibliographic universe moving from information silos and MARC encoding to distributed systems and Linked Open Data. The bibliographic work concept is analyzed from a historical perspective, and central in this are the main objectives for the bibliographic catalog. The starting point of the thesis is the closing request from the Pode-project, for national authority records establishing open unique identifiers for bibliographical works and authors. Design criteria for a new type of authority system based on FRBR and semantic technology are discussed, forming the basis for a simplified conceptual model, - an ontology. The ontology is realized using RDF and OWL, and a simplified prototype of the authority system is implemented using the Protégé ontology editor and knowledge-base framework. Finally the most important design criteria are tested using SPARQL queries.

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