#$Id: nvdlSimple.rnc,v 1.1 2007/01/31 02:41:34 makoto Exp $
#
# schema and message are annotation-free.

namespace local = ""
default namespace nvdl = "http://purl.oclc.org/dsdl/nvdl/ns/structure/1.0"

start =
  element rules {
    attribute startMode { xsd:NCName }, trigger*, mode+
  }

trigger =
  element trigger {
    attribute ns { xsd:string },
    attribute nameList { list { xsd:NCName } }
  }

mode =
  element mode {
    attribute name { xsd:NCName },
    rule*
  }

rule =
  element namespace {
    attribute ns { xsd:string },
    attribute wildCard {xsd:string{maxLength = "1"}},
    ruleModel
  }
  | element anyNamespace { ruleModel }

ruleModel = attribute match { elementsOrAttributes }, actions

elementsOrAttributes =
  "elements" | "attributes"

actions =
  (noResultAction*, (noResultAction|resultAction), noResultAction*)

noResultAction =
  element validate {
    schemaType?,
    (message | option)*,
    schema,
    modeUsage
  }

schema = 
  attribute schema { xsd:anyURI } | 
  element schema {(text | foreignElement)}

message = 
    element message {text & attribute xml:lang {text}?}

resultAction =
  element attach|attachPlaceholder|unwrap { message*, modeUsage }

option =
  element option {
    attribute name { xsd:anyURI },
    attribute arg { text }?,
    attribute mustSupport { xsd:boolean }
  }

modeUsage =
  attribute useMode { xsd:NCName },
  element context {
    attribute path { path },
    attribute useMode { xsd:NCName }
  }*

schemaType = attribute schemaType { mediaType }

## 5.1 of RFC 2045 allows <any (US-ASCII) CHAR except SPACE, CTLs, 
## or tspecials>, where
##
##     tspecials :=  "(" / ")" / "<" / ">" / "@" /
##                   "," / ";" / ":" / "\" / <">
##                   "/" / "[" / "]" / "?" / "="
##

mediaType = 
  xsd:string {
    pattern = "\s*"
              ~ "[0-9A-Za-z!#$%&'\*\+\-\.\^_`\{\|\}~]*"
              ~ "/"
              ~ "[0-9A-Za-z!#$%&'\*\+\-\.\^_`\{\|\}~]*"
              ~ "\s*"}

path =
  xsd:string {
    pattern = "\s*(/\s*)?\i\c*(\s*/\s*\i\c*)*\s*"
              ~ "(\|\s*(/\s*)?\i\c*(\s*/\s*\i\c*)*\s*)*"
  }

foreignElement = 
  element (* - nvdl:*) {attribute * {text}*, mixed{anyElement*}}

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