has extent The size or duration of the resource. :my-dataset dcterms:extent :my-dataset-number-of-statements . :my-dataset-number-of-statements a dcterms:SizeOrDuration ; rdf:value 146 . This is used to specify a possible extent for the resource under consideration, defined as an individual of the class `dcterms:SizeOrDuration`. When possible, such an individual can be accompanied by more specific data properties depending on the actual extent we are considering (e.g. `rdf:value`, `prism:pageRange`, `fabio:hasPageCount`, etc.).