datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes">

  <start>

      <ref name="element-alerts"/>

  </start>

  <define name="element-alerts">

    <optional>

    <element name="alerts">

      <zeroOrMore>

        <element name="alert">

          <attribute name="id"><data type="ID"/></attribute>

          <optional>

            <attribute name="description"><text/></attribute>

          </optional>

          <attribute name="path"><text/></attribute>

          <ref name="element-alert-extra"/>

          <zeroOrMore>

            <element name="recipient">

              <attribute name="id"><data type="ID"/></attribute>

              <optional>

                <attribute name="description"><text/></attribute>

              </optional>

              <attribute name="value"><text/></attribute>

              <ref name="element-alert-extra"/>

            </element>

          </zeroOrMore>

        </element>

      </zeroOrMore>

    </element>

    </optional>

  </define>

  <define name="element-alert-extra">

      <zeroOrMore>

        <choice>

          <element name="meta_attributes">

            <externalRef href="nvset-1.3.rng"/>

          </element>

          <element name="instance_attributes">

            <externalRef href="nvset-1.3.rng"/>

          </element>

        </choice>

      </zeroOrMore>

  </define>

</grammar>