Figure 2

Entities in the S3DB Core Model and its attributes. A minimal set of common attributes was defined (left) for each of the S3DB entities using RDF Schema (rdfs) and Dublin core (dc) terminology - these are rdf:id, rdfs:label, dc:description, dc:created and dc:creator. Other attributes, which are specific to each of the S3DB entities (right), such as foaf:mbox for the entity User or s3db:project_id for the entity Collection reflect the s3db:relationships described above and formalized in the S3DB conceptual model (figure 3).