An open annotation ontology for science on web 3.0

Table 3 Additional annotation types can be used for creating SKOS like annotation.

Qualifier	skos:relatedMatch	Qualifier expresses the relationship between the object of the annotation and a well-defined representational unit. It allows a free text body. If only free text is present -this is equivalent to a tag.
ExactQualifier	skos:exactMatch	Used when the object of the relationship ao:hasTopic represents exactly the portion of the annotated document.
CloseQualifier	skos:closeMatch	Used when the object of the relationship ao:hasTopic represents closely but not exactly the portion of the annotated document.
BroadQualifier	skos:broadMatch	Used when the object of the relationship ao:hasTopic represents more broadly the portion of the annotated document.
NarrowQualifier	skos:narrowMatch	Used when the object of the relationship ao:hasTopic represents more specifically the portion of the annotated document.

ISSN: 2041-1480