| <xs:element name="output">
  <xs:complexType>
    <xs:sequence>
      <xs:sequence>
        <xs:choice minOccurs="0" maxOccurs="unbounded">
          <xs:element ref="p:documentation"/>
          <xs:element ref="p:pipeinfo"/>
        </xs:choice>
        <xs:choice>
          <xs:sequence>
            <xs:element ref="p:empty"/>
            <xs:choice minOccurs="0" maxOccurs="unbounded">
              <xs:element ref="p:documentation"/>
              <xs:element ref="p:pipeinfo"/>
            </xs:choice>
          </xs:sequence>
          <xs:sequence minOccurs="0" maxOccurs="unbounded">
            <xs:choice>
              <xs:element ref="p:data"/>
              <xs:element ref="p:document"/>
              <xs:element ref="p:pipe"/>
              <xs:element ref="p:inline"/>
            </xs:choice>
            <xs:choice minOccurs="0" maxOccurs="unbounded">
              <xs:element ref="p:documentation"/>
              <xs:element ref="p:pipeinfo"/>
            </xs:choice>
          </xs:sequence>
        </xs:choice>
      </xs:sequence>
    </xs:sequence>
     |