1default namespace = ""
 2namespace xsi = "http://www.w3.org/2001/XMLSchema-instance"
 3
 4start =
 5  element param1-param2-info {
 6    attribute xsi:noNamespaceSchemaLocation { xsd:anyURI },
 7    element register {
 8      element service { xsd:integer } &
 9      element subservice { xsd:integer } &
10      element apid { xsd:integer }? &
11      (element param1-offset { xsd:integer } &
12      element param1-width { xsd:integer })? &
13      (element param2-offset { xsd:integer }&
14       element param2-width { xsd:integer })?
15    }+
16  }