test/DAWG/data-r2/optional/q-opt-complex-1.rq


1
2
3
4
5
6
7
8
9
10
11

PREFIX  foaf:   <http://xmlns.com/foaf/0.1/>
SELECT ?person ?nick ?page ?img ?name ?firstN
{ 
    ?person foaf:nick ?nick
    OPTIONAL { ?person foaf:isPrimaryTopicOf ?page } 
    OPTIONAL { 
        ?person foaf:name ?name 
        { ?person foaf:depiction ?img } UNION 
        { ?person foaf:givenName ?firstN }
    } FILTER ( bound(?page) || bound(?img) || bound(?firstN) ) 
}