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

  <start>

      <ref name="element-constraints"/>

  </start>

  <define name="element-constraints">

    <element name="constraints">

      <zeroOrMore>

        <choice>

          <ref name="element-location"/>

          <ref name="element-colocation"/>

          <ref name="element-order"/>

          <ref name="element-rsc_ticket"/>

        </choice>

      </zeroOrMore>

    </element>

  </define>

  <define name="element-location">

    <element name="rsc_location">

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

      <choice>

        <group>

          <attribute name="rsc"><data type="IDREF"/></attribute>

          <optional>

            <attribute name="role">

              <ref name="attribute-roles"/>

            </attribute>

          </optional>

        </group>

        <oneOrMore>

          <ref name="element-resource-set"/>

        </oneOrMore>

      </choice>

      <choice>

        <group>

          <externalRef href="score.rng"/>

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

        </group>

        <oneOrMore>

          <externalRef href="rule.rng"/>

        </oneOrMore>

      </choice>

      <optional>

        <ref name="element-lifetime"/>

      </optional>

      <optional>

        <attribute name="resource-discovery">

          <ref name="attribute-discovery"/>

        </attribute>

      </optional>

    </element>

  </define>

  <define name="element-resource-set">

    <element name="resource_set">

      <choice>

        <attribute name="id-ref"><data type="IDREF"/></attribute>

        <group>

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

          <optional>

            <attribute name="sequential"><data type="boolean"/></attribute>

          </optional>

          <optional>

            <attribute name="require-all"><data type="boolean"/></attribute>

          </optional>

          <optional>

            <attribute name="ordering">

              <choice>

                <value>group</value>

                <value>listed</value>

              </choice>

            </attribute>

          </optional>

          <optional>

            <attribute name="action">

              <ref name="attribute-actions"/>

            </attribute>

          </optional>

          <optional>

            <attribute name="role">

              <ref name="attribute-roles"/>

            </attribute>

          </optional>

          <optional>

            <externalRef href="score.rng"/>

          </optional>

          <oneOrMore>

            <element name="resource_ref">

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

            </element>

          </oneOrMore>

        </group>

      </choice>

    </element>

  </define>

  <define name="element-colocation">

    <element name="rsc_colocation">

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

      <optional>

        <choice>

          <externalRef href="score.rng"/>

          <attribute name="score-attribute"><text/></attribute>

          <attribute name="score-attribute-mangle"><text/></attribute>

        </choice>

      </optional>

      <optional>

        <ref name="element-lifetime"/>

      </optional>

      <choice>

        <oneOrMore>

          <ref name="element-resource-set"/>

        </oneOrMore>

        <group>

          <attribute name="rsc"><data type="IDREF"/></attribute>

          <attribute name="with-rsc"><data type="IDREF"/></attribute>

          <optional>

            <attribute name="node-attribute"><text/></attribute>

          </optional>

          <optional>

            <attribute name="rsc-role">

              <ref name="attribute-roles"/>

            </attribute>

          </optional>

          <optional>

            <attribute name="with-rsc-role">

              <ref name="attribute-roles"/>

            </attribute>

          </optional>

        </group>

      </choice>

    </element>

  </define>

  <define name="element-order">

    <element name="rsc_order">

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

      <optional>

        <ref name="element-lifetime"/>

      </optional>

      <optional>

        <attribute name="symmetrical"><data type="boolean"/></attribute>

      </optional>

      <optional>

        <choice>

          <externalRef href="score.rng"/>

          <attribute name="kind">

            <ref name="order-types"/>

          </attribute>

        </choice>

      </optional>

      <choice>

        <oneOrMore>

          <ref name="element-resource-set"/>

        </oneOrMore>

        <group>

          <attribute name="first"><data type="IDREF"/></attribute>

          <attribute name="then"><data type="IDREF"/></attribute>

          <optional>

            <attribute name="first-action">

              <ref name="attribute-actions"/>

            </attribute>

          </optional>

          <optional>

            <attribute name="then-action">

              <ref name="attribute-actions"/>

            </attribute>

          </optional>

        </group>

      </choice>

    </element>

  </define>

  <define name="element-rsc_ticket">

    <element name="rsc_ticket">

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

      <choice>

        <oneOrMore>

          <ref name="element-resource-set"/>

        </oneOrMore>

        <group>

          <attribute name="rsc"><data type="IDREF"/></attribute>

          <optional>

            <attribute name="rsc-role">

              <ref name="attribute-roles"/>

            </attribute>

          </optional>

        </group>

      </choice>

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

      <optional>

        <attribute name="loss-policy">

          <choice>

            <value>stop</value>

            <value>demote</value>

            <value>fence</value>

            <value>freeze</value>

          </choice>

        </attribute>

      </optional>

    </element>

  </define>

  <define name="attribute-discovery">

    <choice>

      <value>always</value>

      <value>never</value>

      <value>exclusive</value>

    </choice>

  </define>

  <define name="attribute-actions">

    <choice>

      <value>start</value>

      <value>promote</value>

      <value>demote</value>

      <value>stop</value>

    </choice>

  </define>

  <define name="attribute-roles">

    <choice>

      <value>Stopped</value>

      <value>Started</value>

      <value>Master</value>

      <value>Slave</value>

    </choice>

  </define>

  <define name="order-types">

    <choice>

      <value>Optional</value>

      <value>Mandatory</value>

      <value>Serialize</value>

    </choice>

  </define>

  <define name="element-lifetime">

    <element name="lifetime">

      <oneOrMore>

        <externalRef href="rule.rng"/>

      </oneOrMore>

    </element>

  </define>

</grammar>