@prefix rs:      <http://www.w3.org/2001/sw/DataAccess/tests/result-set#> .

[]  <http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
                rs:ResultSet ;
    rs:resultVariable
                "a" , "b" ;
    rs:solution [ rs:binding  [ rs:value    <http://example.org/data/y> ;
                                rs:variable "a"
                              ] ;
                  rs:binding  [ rs:value    <http://example.org/data/x> ;
                                rs:variable "b"
                              ]
                ] .