## PREFIX  rdf:    <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
## PREFIX  rdfs:   <http://www.w3.org/2000/01/rdf-schema#>
## PREFIX  xsd:    <http://www.w3.org/2001/XMLSchema#>
## PREFIX  owl:    <http://www.w3.org/2002/07/owl#>

PREFIX  :        <http://example/>
PREFIX  jext:    <java:com.hp.hpl.jena.query.extension.library.>
PREFIX  jfn:     <java:com.hp.hpl.jena.query.function.library.>

SELECT ?item
{ :x ?p ?bag .
  FILTER ( ?p = :bag || ?p = :seq || ?p = :alt )
  EXT jext:container(?bag, ?item)
}