@prefix dc: <http://purl.org/dc/elements/1.1/> .
@prefix ex: <http://example.org/vocab#> .

<http://example.org/library> a ex:Library;
   ex:contains <http://example.org/library/the-republic> .

<http://example.org/library/the-republic> a ex:Book;
   ex:contains <http://example.org/library/the-republic#introduction>;
   dc:creator "Plato";
   dc:title "The Republic" .

<http://example.org/library/the-republic#introduction> a ex:Chapter;
   dc:description "An introductory chapter on The Republic.";
   dc:title "The Introduction" .