# A.rnc
default namespace = "http://foo.com/a"
datatypes xsd = "http://www.w3.org/2001/XMLSchema-datatypes"

start = element x {
  element-foo+
}

element-foo = element foo {
 element x { xsd:integer }
 & element y { xsd:integer }
 & element bar { bar-contents }+
}

bar-contents =  (
 element a { xsd:integer }
)