@prefix rs:      <http://www.w3.org/2001/sw/DataAccess/tests/result-set#> .
@prefix rdf:     <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix :        <http://example.org/ns#> .
@prefix fn:      <http://example.org/functions#> .

[]    rdf:type    rs:ResultSet ;
      rs:resultVariable  "z" .
