Figure 2

OSD dataset. A directed graph representing a subset of the Ocean Sampling Day prototype data that was coded into RDF according to the semantics of the Biological Collections Ontology (BCO). In this graph, there are two instances of the type obi:specimen called “water_Sample_Helgoland1” and “filtered_Sample_Helgoland1) linked by an instance of obi:specimen collection called “filtering process”. Blue ovals represent instances, green ovals ontology classes, and black ovals literals, whereas relations (a.k.a. properties) are represented as arrows. Properties and classes are prefixed with an abbreviation from the vocabulary from which they come (ro = Relations Ontology, envo = Environment Ontology, obi = Ontology for Biomedical Investigations, dwc = Darwin Core, bfo = Basic Formal Ontology,), except for properties that do not yet exist in a controlled vocabulary and are prefixed with “urn”. Labels have been altered for readability from the original data set used to generate this graph.