<xsd:complexType name="OUL_R23.SPECIMEN.CONTENT"> <xsd:sequence> <xsd:element ref="SPM" minOccurs="1" maxOccurs="1" /> <xsd:element ref="OBX" minOccurs="0" maxOccurs="unbounded" /> <xsd:element ref="OUL_R23.CONTAINER" minOccurs="1" maxOccurs="unbounded" /> </xsd:sequence> </xsd:complexType>