RDF* example: books.ttl

PREFIX dc:        <http://purl.org/dc/elements/1.1/>
PREFIX vcard:     <http://www.w3.org/2001/vcard-rdf/3.0#>
PREFIX ns:        <http://example.org/ns#>

PREFIX :          <http://example.org/book/>

# This data is intentionaly irregular (e.g. different ways to
# record the book creator) as if the information is either an
# aggregation or was created at different times.

<< :book1 dc:creator  "J.K. Rowling" >> dc:source "Bruno" .

<< :book5 dc:creator  "J.K. Rowling" >> dc:source "Andy" .


:book1
    dc:title    "Harry Potter and the Philosopher's Stone" ;
    dc:creator  "J.K. Rowling" ;
    .
    
:book2
    dc:title    "Harry Potter and the Chamber of Secrets" ;
    dc:creator  _:a .
    
:book3
    dc:title    "Harry Potter and the Prisoner Of Azkaban" ;
    dc:creator  _:a .
    
:book4
    dc:title    "Harry Potter and the Goblet of Fire" .
    
:book5
    dc:title    "Harry Potter and the Order of the Phoenix";
    dc:creator  "J.K. Rowling" ;
    .

:book6
    dc:title    "Harry Potter and the Half-Blood Prince";
    dc:creator  "J.K. Rowling" .

:book7
    dc:title    "Harry Potter and the Deathly Hallows" ;
    dc:creator  "J.K. Rowling" .
_:a
    vcard:FN "J.K. Rowling" ;
    vcard:N
        [ vcard:Family "Rowling" ;
          vcard:Given "Joanna" 
        ]
    .

RDF* example: query.arq

prefix purl: <http://purl.org/dc/elements/1.1/>
prefix vcard: <http://www.w3.org/2001/vcard-rdf/3.0#>
prefix dc: <http://purl.org/dc/elements/1.1/>
prefix : <http://example.org/book/>

SELECT ?source ?title
WHERE {
  <<?book dc:creator ?author>> dc:source ?source .
  ?book dc:title ?title .
}