RDF Core WG draft of RDF/XML Syntax Specification (Revised) for review

This is http://ilrt.org/discovery/2001/07/rdf-syntax-grammar/
CVS version 1.350
Full CVS history at 
http://cvs.ilrt.org/cvsweb/redland/rdfcore/syntax/index.html

Dave


#
# RELAX NG Schema (non-XML) for RDF/XML Syntax
#
# This schema is for information only and NON-NORMATIVE
#
# It is based on one originally written by James Clark in
# http://lists.w3.org/Archives/Public/www-rdf-comments/2001JulSep/0248.html
# and updated with later changes.
#

namespace local = ""
namespace rdf = "http://www.w3.org/1999/02/22-rdf-syntax-ns#"
datatypes xsd = "http://www.w3.org/2001/XMLSchema-datatypes"

start = doc
doc = 
  RDF

RDF =
  element rdf:RDF { nodeElementList }

nodeElementList = 
  nodeElement*

  # Should be something like:
  #  ws* , (  nodeElement , ws* )*
  # but RELAXNG does this by default, ignoring whitespace separating tags.

nodeElement =
  element * - (local:*
               |rdf:RDF
	       |rdf:ID|rdf:about
	       |rdf:bagID|rdf:parseType|rdf:resource
               |rdf:li ) {
      (idAttr | aboutAttr )?, bagIdAttr?, propertyAttr*, propertyEltList
  }

  # It is not possible to say "and not things
  # beginning with _ in the rdf: namespace" in RELAX NG.

ws = 
  " "

  # Not used in this RELAX NG schema; but should be any legal XML
  # whitespace defined by http://www.w3.org/TR/2000/REC-xml-20001006#NT-S


propertyEltList = 
  propertyElt*

  # Should be something like:
  #  ws* , ( propertyElt , ws* )*
  # but RELAXNG does this by default, ignoring whitespace separating tags.

propertyElt = 
  resourcePropertyElt | 
  literalPropertyElt | 
  parseTypeLiteralPropertyElt |
  parseTypeResourcePropertyElt |
  parseTypeOtherPropertyElt |
  emptyPropertyElt

resourcePropertyElt = 
  element * - (local:*
	       |rdf:RDF|rdf:Description
	       |rdf:ID|rdf:about
	       |rdf:bagID|rdf:parseType|rdf:resource) {
      idAttr?, nodeElement
  }

literalPropertyElt =
  element * - (local:*
               |rdf:RDF|rdf:Description
	       |rdf:ID|rdf:about
	       |rdf:bagID|rdf:parseType|rdf:resource) {
      idAttr?, text 
  }

parseTypeLiteralPropertyElt = 
  element * - (local:*
               |rdf:RDF|rdf:Description
               |rdf:ID|rdf:about
               |rdf:bagID|rdf:parseType|rdf:resource) {
      idAttr?, parseLiteral, literal 
  }

parseTypeResourcePropertyElt = 
  element * - (local:*
               |rdf:RDF|rdf:Description
               |rdf:ID|rdf:about
               |rdf:bagID|rdf:parseType|rdf:resource) {
      idAttr?, parseResource, propertyEltList
  }

parseTypeOtherPropertyElt = 
  element * - (local:*
               |rdf:RDF|rdf:Description
               |rdf:ID|rdf:about
               |rdf:bagID|rdf:parseType|rdf:resource) {
      idAttr?, parseOther, any
  }

emptyPropertyElt =
   element * - (local:*
                |rdf:RDF|rdf:Description
                |rdf:ID|rdf:about
		|rdf:bagID|rdf:parseType|rdf:resource) {
       idAttr?, resourceAttr?, bagIdAttr?, propertyAttr* 
   }

idAttr = 
  attribute rdf:ID { 
      IDsymbol 
  }

aboutAttr = 
  attribute rdf:about { 
      URI-reference 
  }

bagIdAttr = 
  attribute rdf:bagID {
      IDsymbol
  }

propertyAttr = 
  attribute * - (local:* 
                 |rdf:RDF|rdf:Description
                 |rdf:ID|rdf:about
		 |rdf:bagID|rdf:parseType|rdf:resource
		 |rdf:li) {
      string
  }

resourceAttr = 
  attribute rdf:resource {
      URI-reference 
  }

parseLiteral = 
  attribute rdf:parseType {
      "Literal" 
  }

parseResource = 
  attribute rdf:parseType {
      "Resource" 
  }

parseOther = 
  attribute rdf:parseType {
      text
  }

URI-reference = 
  string

literal =
  any

IDsymbol = 
  xsd:NMTOKEN

any =
  mixed { element * { attribute * { text }*, any }* }