The main element in the metadata and provenance model part is the dataset. As shown in Figure , the class dcat:Dataset from the DCAT vocabulary is used to represent a dataset. Each dataset is described with several predicates from the Dublin Core Metadata Terms vocabulary , namely, dct:title for title, dct:description for description, dct:issued for the year of publication and dct:license for licence information. It is important to notice that, according to the DCAT documentation, license information should be provided on the level of dcat:Distribution. It may be provided on dcat:Dataset level but it should the same one on the dcat:Distribution level. Otherwise, it can create legal conflicts. The RDF created from a dataset is represented by dcat:Distribution. It is also annotated with the void:Dataset class from the VoID vocabulary (for expressing metadata about RDF datasets) and prov:Entity class from the PROV-O ontology, needed to describe the provenance of creating the distribution. The distribution has several predicates describing its title, description, issue year and license. Moreover, an RDF distribution has an identifier dct:identifier, a link to a web page about the dataset (dcat:landingPage and foaf:homePage), a link to the SPARQL endpoint hosting the RDF (void:sparqlEndpoint and dcat:accessURL), and a link to the download URL of the RDF file (dcat:downloadURL and void:dataDump). The distribution links to the author via dct:creator and dcat:contactPoint and the publisher using dct:publisher. Classes from three vocabularies (FOAF, PROV-O, and vCard) were used to describe the author (foaf:Person, prov:Person, vcard:Individual ) and the publisher (foaf:Organization, prov:Organization, vcard:Organization). Thus, increasing interoperability with other resources using any of these vocabularies. The author is annotated with predicates from FOAF representing the author full name foaf:name, first name foaf:givenName, last name foaf:familyName, and a link to publications foaf:publications. The author can have an online account or a personal profile through foaf:acount which is described as foaf:PersonalProfileDocument and foaf:OnlineAccount.