[RDF Graph] dc:identifier for TMFResource and AuthorKeyword entities

[giovannigarifo]

Both TMFResource and AuthorKeyword entities don't have the dc:identifier property assigned in the RDF graph.

Possible solution: use trailing part of URI as identifier, i.e. for http://dbpedia.org/page/Data_model use Data_model, result should be something like:

<!-- prefixes dbpedia and geranium defined before -->
<rdf:Description rdf:about="dbpedia:resource/Data_model">
        <rdf:type rdf:resource="geranium:ontology/TMFResource"/>
        <rdfs:label>Data Model</rdfs:label>
        <dc:identifier>Data_model</dc:identifier>
</rdf:Description>

Same goes for AuthorKeyword class.

[giovannigarifo]

@giuseppefutia your opinion is kindly requested :-)

[mehdikhrichfa]

Done.