`The Art & Architecture Thesaurus <http://vocab.getty.edu/aat>/`__. A vocabulary provided by the Getty.
The J. Paul Getty Trust is a cultural and philanthropic institution dedicated to critical thinking in the presentation, conservation, and interpretation of the world’s artistic legacy. Through the collective and individual work of its constituent Programs—Getty Conservation Institute, Getty Foundation, J. Paul Getty Museum, and Getty Research Institute—it pursues its mission in Los Angeles and throughout the world, serving both the general interested public and a wide range of professional communities with the conviction that a greater and more profound sensitivity to and knowledge of the visual arts and their many histories are crucial to the promotion of a vital and civil society. More information: http://www.getty.edu
Resource Description Framework. A very flexible model for data definition organised around triples. These triples forms a directed, labeled graph, where the edges represent the named link between two resources, represented by the graph nodes.
A Uniform Resource Identifier.
A URN is a specific form of a URI.