default namespace = "http://www.dehora.net/r/2004/07/"

start = rdf
rdf =
  element rdf {
    attribute version { "20040718" },
    quoted?,
    graph*
  }
graph = element graph { quoted?, description?, context?, statement* }
description = element description { text }
context = element context { uri }
statement = element statement { context?, (subject & property & value) }
subject = element subject { bnode | uri }
property = element property { uri }
value = valueURI | valueBNODE | valueTYP | valueTYPXML
valueURI = element value { uri }
valueBNODE = element value { bnode }
valueTYP =
  element value {
    attribute type { xsd:anyURI }?,
    text
  }
valueTYPXML =
  element value {
    attribute type { "http://www.dehora.net/r/2004/07/type/xml" },
    ANY
  }
ANY =
  element * {
    (attribute * { text }
     | text
     | ANY)*
  }
quoted = attribute quoted { "yes" | "no" }
uri = attribute uri { xsd:anyURI }
bnode = attribute bnode { xsd:NMTOKEN }