Figure 2. Annotation providing a taxonomic identification.

Figure illustrates an abbreviated annotation providing a taxonomic identification for an occurrence record. The record is selected by reference to a lengthy identifier in the namespace of the Harvard University Herbaria (prefix “huh:”). [RDF S1] is a complete RDF representation in N3 syntax. The prefixes “oa:”, “oad:” and “dwcFP:” indicate terms respectively from the Open Annotation Ontology [61], the extension ontology we propose [Ontology S1], and a purpose built OWL ontology [Ontology S2] representation of the Darwin Core vocabulary [29].  https://doi.org/10.1371/journal.pone.0076093.g002