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We do much work with the German authority file GND (Gemeinsame Normdatei), specifically its RDF version. The underlying GND ontology was published last year and I must admit I haven't been taking the time yet to get an overview over the ontology. Today I started by getting to know the hierarchical structure of the ontology's classes. As I didn't find an overview on the web, I created my own and publish it here.

First I took the current GND ontology turtle file from the GND namespace http://d-nb.info/standards/elementset/gnd#, extracted only the classes and their rdfs:subProperty as well as the few owl:EquivalentClass relations, converted the result to dot format using rapper and created the following graph image from this:

(Link to high resolution image)

As one can see on the image, GND ontology's class hierarchy extends over three levels (except of gnd:Person which adds another level to distinguish between differentiated person and undifferenitiated persons, i.e. person names). The top class is gnd:AuthorityUnit which has seven subclasses that have several subclasses themselves. Additionally, there is the seperate class gnd:NameOfThePerson that isn't directly linked (with rdfs:subClassOf) to other GND classes at all. Here is a bulleted list providing another view of GND ontology's the class hierarchy. (For better readability I put spaces into the GND URI class names.)

  • Name of the Person
  • Authority Resource
    • Corporate Body
      • Fictive Corporate Body
      • Organ of Corporate Body
      • Project or Program
    • Conference or Event
      • Series of Conference or Event
    • Subject Heading
      • Subject Heading Senso Stricto
      • Characters or Morphemes
      • Ethnographic Name
      • Fictive Term
      • Group of Persons
      • Historic Single Event or Era
      • Language
      • Means of Transport with Individual Name
      • Nomenclature in Biology or Chemistry
      • Product Name or Brand Name
      • Software Product
    • Work
      • Manuscript
      • Musical Work
      • Provenance Characteristic
      • Version of a Musical Work
      • Collection
      • Collective Manuscript
    • Place or Geographic Name
      • Fictive Place
      • Member State
      • Name of Small Geographic Unit Lying within another Geographic Unit
      • Natural Geographic Unit
      • Religious Territory
      • Territorial Corporate Body or Administrative Unit
      • Administrative Unit
      • Way, Border or Line
      • Building or Memorial
      • Country
      • Extraterrestrial Territory
    • Person
      • Differentiated Person
        • Collective Pseudonym
        • Gods
        • Literary or Legendary Character
        • Pseudonym
        • Royal or Member of a Royal House
        • Spirits
      • Undifferentiated Person
    • Family