audacity/lib-src/redland/rasqal/tests/sparql/SyntaxDev/Syntax-SPARQL/syntax-pat-04.rq

# No DOT between non-triples patterns
PREFIX : <http:/example.org/ns#> 
SELECT *
{
  OPTIONAL{:x :y :z} 
  ?a :b :c 
  { :x1 :y1 :z1 } UNION { :x2 :y2 :z2 }
}