ns="http://relaxng.org/ns/structure/1.0"

  xmlns="http://relaxng.org/ns/structure/1.0">

  <start>

    <ref name="pattern"/>

  </start>

  <define name="pattern">

    <choice>

      <element name="element">

        <choice>

          <attribute name="name">

            <data type="QName"/>

          </attribute>

          <ref name="open-name-class"/>

        </choice>

        <ref name="common-atts"/>

        <ref name="open-patterns"/>

      </element>

      <element name="attribute">

        <ref name="common-atts"/>

        <choice>

          <attribute name="name">

            <data type="QName"/>

          </attribute>

          <ref name="open-name-class"/>

        </choice>

        <interleave>

          <ref name="other"/>

          <optional>

            <ref name="pattern"/>

          </optional>

        </interleave>

      </element>

      <element name="group">

        <ref name="common-atts"/>

        <ref name="open-patterns"/>

      </element>

      <element name="interleave">

        <ref name="common-atts"/>

        <ref name="open-patterns"/>

      </element>

      <element name="choice">

        <ref name="common-atts"/>

        <ref name="open-patterns"/>

      </element>

      <element name="optional">

        <ref name="common-atts"/>

        <ref name="open-patterns"/>

      </element>

      <element name="zeroOrMore">

        <ref name="common-atts"/>

        <ref name="open-patterns"/>

      </element>

      <element name="oneOrMore">

        <ref name="common-atts"/>

        <ref name="open-patterns"/>

      </element>

      <element name="list">

        <ref name="common-atts"/>

        <ref name="open-patterns"/>

      </element>

      <element name="mixed">

        <ref name="common-atts"/>

        <ref name="open-patterns"/>

      </element>

      <element name="ref">

        <attribute name="name">

          <data type="NCName"/>

        </attribute>

        <ref name="common-atts"/>

        <ref name="other"/>

      </element>

      <element name="parentRef">

        <attribute name="name">

          <data type="NCName"/>

        </attribute>

        <ref name="common-atts"/>

        <ref name="other"/>

      </element>

      <element name="empty">

        <ref name="common-atts"/>

        <ref name="other"/>

      </element>

      <element name="text">

        <ref name="common-atts"/>

        <ref name="other"/>

      </element>

      <element name="value">

        <optional>

          <attribute name="type">

            <data type="NCName"/>

          </attribute>

        </optional>

        <ref name="common-atts"/>

        <text/>

      </element>

      <element name="data">

        <attribute name="type">

          <data type="NCName"/>

        </attribute>

        <ref name="common-atts"/>

        <interleave>

          <ref name="other"/>

          <group>

            <zeroOrMore>

              <element name="param">

                <attribute name="name">

                  <data type="NCName"/>

                </attribute>

                <ref name="common-atts"/>

                <text/>

              </element>

            </zeroOrMore>

            <optional>

              <element name="except">

                <ref name="common-atts"/>

                <ref name="open-patterns"/>

              </element>

            </optional>

          </group>

        </interleave>

      </element>

      <element name="notAllowed">

        <ref name="common-atts"/>

        <ref name="other"/>

      </element>

      <element name="externalRef">

        <attribute name="href">

          <data type="anyURI"/>

        </attribute>

        <ref name="common-atts"/>

        <ref name="other"/>

      </element>

      <element name="grammar">

        <ref name="common-atts"/>

        <ref name="grammar-content"/>

      </element>

    </choice>

  </define>

  <define name="grammar-content">

    <interleave>

      <ref name="other"/>

      <zeroOrMore>

        <choice>

          <ref name="start-element"/>

          <ref name="define-element"/>

          <element name="div">

            <ref name="common-atts"/>

            <ref name="grammar-content"/>

          </element>

          <element name="include">

            <attribute name="href">

              <data type="anyURI"/>

            </attribute>

            <ref name="common-atts"/>

            <ref name="include-content"/>

          </element>

        </choice>

      </zeroOrMore>

    </interleave>

  </define>

  <define name="include-content">

    <interleave>

      <ref name="other"/>

      <zeroOrMore>

        <choice>

          <ref name="start-element"/>

          <ref name="define-element"/>

          <element name="div">

            <ref name="common-atts"/>

            <ref name="include-content"/>

          </element>

        </choice>

      </zeroOrMore>

    </interleave>

  </define>

  <define name="start-element">

    <element name="start">

      <ref name="combine-att"/>

      <ref name="common-atts"/>

      <ref name="open-pattern"/>

    </element>

  </define>

  <define name="define-element">

    <element name="define">

      <attribute name="name">

        <data type="NCName"/>

      </attribute>

      <ref name="combine-att"/>

      <ref name="common-atts"/>

      <ref name="open-patterns"/>

    </element>

  </define>

  <define name="combine-att">

    <optional>

      <attribute name="combine">

        <choice>

          <value>choice</value>

          <value>interleave</value>

        </choice>

      </attribute>

    </optional>

  </define>

  <define name="open-patterns">

    <interleave>

      <ref name="other"/>

      <oneOrMore>

        <ref name="pattern"/>

      </oneOrMore>

    </interleave>

  </define>

  <define name="open-pattern">

    <interleave>

      <ref name="other"/>

      <ref name="pattern"/>

    </interleave>

  </define>

  <define name="name-class">

    <choice>

      <element name="name">

        <ref name="common-atts"/>

        <data type="QName"/>

      </element>

      <element name="anyName">

        <ref name="common-atts"/>

        <ref name="except-name-class"/>

      </element>

      <element name="nsName">

        <ref name="common-atts"/>

        <ref name="except-name-class"/>

      </element>

      <element name="choice">

        <ref name="common-atts"/>

        <ref name="open-name-classes"/>

      </element>

    </choice>

  </define>

  <define name="except-name-class">

    <interleave>

      <ref name="other"/>

      <optional>

        <element name="except">

          <ref name="open-name-classes"/>

        </element>

      </optional>

    </interleave>

  </define>

  <define name="open-name-classes">

    <interleave>

      <ref name="other"/>

      <oneOrMore>

        <ref name="name-class"/>

      </oneOrMore>

    </interleave>

  </define>

  <define name="open-name-class">

    <interleave>

      <ref name="other"/>

      <ref name="name-class"/>

    </interleave>

  </define>

  <define name="common-atts">

    <optional>

      <attribute name="ns"/>

    </optional>

    <optional>

      <attribute name="datatypeLibrary">

        <data type="anyURI"/>

      </attribute>

    </optional>

    <zeroOrMore>

      <attribute>

        <anyName>

          <except>

            <nsName/>

            <nsName ns=""/>

          </except>

        </anyName>

      </attribute>

    </zeroOrMore>

  </define>

  <define name="other">

    <zeroOrMore>

      <element>

        <anyName>

          <except>

            <nsName/>

          </except>

        </anyName>

        <zeroOrMore>

          <choice>

            <attribute>

              <anyName/>

            </attribute>

            <text/>

            <ref name="any"/>

          </choice>

        </zeroOrMore>

      </element>

    </zeroOrMore>

  </define>

  <define name="any">

    <element>

      <anyName/>

      <zeroOrMore>

        <choice>

          <attribute>

            <anyName/>

          </attribute>

          <text/>

          <ref name="any"/>

        </choice>

      </zeroOrMore>

    </element>

  </define>

</grammar>