Figure 1.
The diagram follows standard UML class diagram conventions. White arrows point from subclass to superclass. Black arrows point at the class that is the range of the property from which the arrow originates.
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].
Figure 3.
Taxonomic identification of a record identified with a set of domain terms.
Note that the Selector is particular to the Darwin Core, so is part of the dwcFP ontology, not the oad ontology. A complete RDF representation is in [RDF S2].
Figure 4.
Linking components using only domain terms.
The annotation uses an assertion within the imaginary photo vocabulary to associate an owner with the image that is the target. As described in the text, this approach cannot guarantee that the linkage arises from the annotation itself. See [RDF S3] for complete RDF representation.
Figure 5.
The photo:owner assertion is more tightly coupled to the annotation than in [Figure 4] to the extent that it is acting on an object whose type is a class on OA. The Open World Assumption notwithstanding, if the photo:owner predicate were removed, the foaf:Person would be unrelated to the annotation, and the tag would carry no knowledge. In this case, a consumer of the annotation could reasonably conclude that it received an incomplete annotation. See [RDF S4] for complete RDF.
Figure 6.
Strong association by use of oa:Motivation.
By use of an oa:Motivation the annotator signals that the purpose of the annotation is to associate the owner with the image. See [RDF S5].
Figure 7.
The annotation models a suggestion that an ordered list of image enhancements be applied to the Target. See [RDF S6] for the complete RDF.