default namespace rng = "http://relaxng.org/ns/structure/1.0"
namespace local = ""
namespace inh = inherit

start = pattern

pattern =
element element { ( attribute name { xsd:QName } | open-name-class ), common-atts, open-patterns }
| element attribute { common-atts, ( attribute name { xsd:QName } | open-name-class ), ( other & pattern? ) }
| element group { common-atts, open-patterns }
| element interleave { common-atts, open-patterns }
| element choice { common-atts, open-patterns }
| element optional { common-atts, open-patterns }
| element zeroOrMore { common-atts, open-patterns }
| element oneOrMore { common-atts, open-patterns }
| element list { common-atts, open-patterns }
| element mixed { common-atts, open-patterns }
| element ref { attribute name { xsd:NCName }, common-atts }
| element parentRef { attribute name { xsd:NCName }, common-atts }
| element empty { common-atts, other }
| element text { common-atts, other }
| element value { attribute type { xsd:NCName }?, common-atts, text }
| element data
{
attribute type { xsd:NCName },
common-atts,
(
other
& ( element param { attribute name { xsd:NCName }, text }*, element except { common-atts, open-patterns }? )
)
}
| element notAllowed { common-atts, other }
| element externalRef { attribute href { xsd:anyURI }, common-atts, other }
| element grammar { common-atts, grammar-content }

grammar-content =
other
& (
start-element
| define-element
| element div { common-atts, grammar-content }
| element include { attribute href { xsd:anyURI }, common-atts, include-content }
)*

include-content = other & ( start-element | define-element | element div { common-atts, include-content } )*

start-element = element start { combine-att, common-atts, open-pattern }

define-element = element define { attribute name { xsd:NCName }, combine-att, common-atts, open-patterns }

combine-att = attribute combine { "choice" | "interleave" }?

open-patterns = other & pattern+

open-pattern = other & pattern

name-class =
element name { common-atts, xsd:QName }
| element anyName { common-atts, except-name-class }
| element nsName { common-atts, except-name-class }
| element choice { common-atts, open-name-classes }

except-name-class = other & element except { open-name-classes }?

open-name-classes = other & name-class+

open-name-class = other & name-class

common-atts =
attribute ns { text }?,
attribute datatypeLibrary { xsd:anyURI }?,
attribute * - (rng:* | local:*) { text }*

other = element * - rng:* { ( attribute * { text } | text | any )* }*

any = element * { ( attribute * { text } | text | any )* }