“or” in a SPARQL query

Question

I don\'t quite understand why in SPARQL they haven\'t implemented the basic logic operators. However in most of the cases is possible to obtain the same result in a number of wa

Answer 1

If you want to trace which predicate lead to which object then this is universal solution for "OR" :

SELECT DISTINCT ?s ?o1 ?o2 
WHERE {
  {
     ?s p1 ?o1 .
     OPTIONAL
     {
        ?s p2 ?o2 .
     }
  } 
  UNION 
  {
     ?s p2 ?o2 .
     OPTIONAL
     {
        ?s p1 ?o1 .
     }
  }
}