etc/schema/rdfxml.rnc

   1 # RELAX NG Compact Schema for RDF/XML Syntax
   2 #
   3 # Copyright (C) 2001-2008 World Wide Web Consortium, (Massachusetts
   4 # Institute of Technology, European Research Consortium for
   5 # Informatics and Mathematics, Keio University).  All Rights Reserved.
   6 # This work is distributed under the W3C(R) Software License in the
   7 # hope that it will be useful, but WITHOUT ANY WARRANTY; without even
   8 # the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
   9 # PURPOSE.
  10 #
  11 # This schema is for information only and NON-NORMATIVE
  12 #
  13 # It is based on one originally written by James Clark in
  14 # http://lists.w3.org/Archives/Public/www-rdf-comments/2001JulSep/0248.html
  15 # and updated with later changes.
  16
  17 namespace local = ""
  18 namespace rdf = "http://www.w3.org/1999/02/22-rdf-syntax-ns#"
  19 datatypes xsd = "http://www.w3.org/2001/XMLSchema-datatypes"
  20
  21
  22 start = doc
  23
  24
  25 # I cannot seem to do this in RNGC so they are expanded in-line
  26
  27 # coreSyntaxTerms = rdf:RDF | rdf:ID | rdf:about | rdf:parseType | rdf:resource | rdf:nodeID | rdf:datatype
  28 # syntaxTerms = coreSyntaxTerms | rdf:Description | rdf:li
  29 # oldTerms    = rdf:aboutEach | rdf:aboutEachPrefix | rdf:bagID
  30 # nodeElementURIs       = * - ( coreSyntaxTerms | rdf:li | oldTerms )
  31 # propertyElementURIs   = * - ( coreSyntaxTerms | rdf:Description | oldTerms )
  32 # propertyAttributeURIs = * - ( coreSyntaxTerms | rdf:Description | rdf:li | oldTerms )
  33
  34 # Also needed to allow rdf:li on all property element productions
  35 # since we can't capture the rdf:li rewriting to rdf_<n> in relaxng
  36
  37 # Need to add these explicitly
  38 xmllang = attribute xml:lang { text }
  39 xmlbase = attribute xml:base { text }
  40 # and to forbid every other xml:* attribute, element
  41
  42 doc =
  43   RDF
  44
  45 RDF =
  46   element rdf:RDF {
  47      xmllang?, xmlbase?, nodeElementList
  48 }
  49
  50 nodeElementList =
  51   nodeElement*
  52
  53   # Should be something like:
  54   #  ws* , (  nodeElement , ws* )*
  55   # but RELAXNG does this by default, ignoring whitespace separating tags.
  56
  57 nodeElement =
  58   element * - ( local:* | rdf:RDF | rdf:ID | rdf:about | rdf:parseType |
  59                 rdf:resource | rdf:nodeID | rdf:datatype | rdf:li |
  60                 rdf:aboutEach | rdf:aboutEachPrefix | rdf:bagID ) {
  61       (idAttr | nodeIdAttr | aboutAttr )?, xmllang?, xmlbase?, propertyAttr*, propertyEltList
  62   }
  63
  64   # It is not possible to say "and not things
  65   # beginning with _ in the rdf: namespace" in RELAX NG.
  66
  67 ws =
  68   " "
  69
  70   # Not used in this RELAX NG schema; but should be any legal XML
  71   # whitespace defined by http://www.w3.org/TR/2000/REC-xml-20001006#NT-S
  72
  73
  74 propertyEltList =
  75   propertyElt*
  76
  77   # Should be something like:
  78   #  ws* , ( propertyElt , ws* )*
  79   # but RELAXNG does this by default, ignoring whitespace separating tags.
  80
  81 propertyElt =
  82   resourcePropertyElt |
  83   literalPropertyElt |
  84   parseTypeLiteralPropertyElt |
  85   parseTypeResourcePropertyElt |
  86   parseTypeCollectionPropertyElt |
  87   parseTypeOtherPropertyElt |
  88   emptyPropertyElt
  89
  90 resourcePropertyElt =
  91   element * - ( local:* | rdf:RDF | rdf:ID | rdf:about | rdf:parseType |
  92                 rdf:resource | rdf:nodeID | rdf:datatype |
  93                 rdf:Description | rdf:aboutEach | rdf:aboutEachPrefix | rdf:bagID |
  94                 xml:* ) {
  95       idAttr?, xmllang?, xmlbase?, nodeElement
  96   }
  97
  98 literalPropertyElt =
  99   element * - ( local:* | rdf:RDF | rdf:ID | rdf:about | rdf:parseType |
 100                 rdf:resource | rdf:nodeID | rdf:datatype |
 101                 rdf:Description | rdf:aboutEach | rdf:aboutEachPrefix | rdf:bagID |
 102                 xml:* ) {
 103       (idAttr | datatypeAttr )?, xmllang?, xmlbase?, text
 104   }
 105
 106 parseTypeLiteralPropertyElt =
 107   element * - ( local:* | rdf:RDF | rdf:ID | rdf:about | rdf:parseType |
 108                 rdf:resource | rdf:nodeID | rdf:datatype |
 109                 rdf:Description | rdf:aboutEach | rdf:aboutEachPrefix | rdf:bagID |
 110                 xml:* ) {
 111       idAttr?, parseLiteral, xmllang?, xmlbase?, literal
 112   }
 113
 114 parseTypeResourcePropertyElt =
 115   element * - ( local:* | rdf:RDF | rdf:ID | rdf:about | rdf:parseType |
 116                 rdf:resource | rdf:nodeID | rdf:datatype |
 117                 rdf:Description | rdf:aboutEach | rdf:aboutEachPrefix | rdf:bagID |
 118                 xml:* ) {
 119       idAttr?, parseResource, xmllang?, xmlbase?, propertyEltList
 120   }
 121
 122 parseTypeCollectionPropertyElt =
 123   element * - ( local:* | rdf:RDF | rdf:ID | rdf:about | rdf:parseType |
 124                 rdf:resource | rdf:nodeID | rdf:datatype |
 125                 rdf:Description | rdf:aboutEach | rdf:aboutEachPrefix | rdf:bagID |
 126                 xml:* ) {
 127       idAttr?, xmllang?, xmlbase?, parseCollection, nodeElementList
 128   }
 129
 130 parseTypeOtherPropertyElt =
 131   element * - ( local:* | rdf:RDF | rdf:ID | rdf:about | rdf:parseType |
 132                 rdf:resource | rdf:nodeID | rdf:datatype |
 133                 rdf:Description | rdf:aboutEach | rdf:aboutEachPrefix | rdf:bagID |
 134                 xml:* ) {
 135       idAttr?, xmllang?, xmlbase?, parseOther, any
 136   }
 137
 138 emptyPropertyElt =
 139    element * - ( local:* | rdf:RDF | rdf:ID | rdf:about | rdf:parseType |
 140                  rdf:resource | rdf:nodeID | rdf:datatype |
 141                  rdf:Description | rdf:aboutEach | rdf:aboutEachPrefix | rdf:bagID |
 142                  xml:* ) {
 143        idAttr?, (resourceAttr | nodeIdAttr)?, xmllang?, xmlbase?, propertyAttr*
 144    }
 145
 146 idAttr =
 147   attribute rdf:ID {
 148       IDsymbol
 149   }
 150
 151 nodeIdAttr =
 152   attribute rdf:nodeID {
 153       IDsymbol
 154   }
 155
 156 aboutAttr =
 157   attribute rdf:about {
 158       URI-reference
 159   }
 160
 161 propertyAttr =
 162   attribute * - ( local:* | rdf:RDF | rdf:ID | rdf:about | rdf:parseType |
 163                   rdf:resource | rdf:nodeID | rdf:datatype | rdf:li |
 164                   rdf:Description | rdf:aboutEach |
 165                   rdf:aboutEachPrefix | rdf:bagID |
 166                   xml:* ) {
 167       string
 168   }
 169
 170 resourceAttr =
 171   attribute rdf:resource {
 172       URI-reference
 173   }
 174
 175 datatypeAttr =
 176   attribute rdf:datatype {
 177       URI-reference
 178   }
 179
 180 parseLiteral =
 181   attribute rdf:parseType {
 182       "Literal"
 183   }
 184
 185 parseResource =
 186   attribute rdf:parseType {
 187       "Resource"
 188   }
 189
 190 parseCollection =
 191   attribute rdf:parseType {
 192       "Collection"
 193   }
 194
 195 parseOther =
 196   attribute rdf:parseType {
 197       text
 198   }
 199
 200 URI-reference =
 201   string
 202
 203 literal =
 204   any
 205
 206 IDsymbol =
 207   xsd:NMTOKEN
 208
 209 any =
 210   mixed { element * { attribute * { text }*, any }* }
 211