webservice schema need element(operation param) to generate required

[milliemc]

Java 1.6, Metro 1.0, Netbeans Java to wsdl webservice using jax-ws.
In the schema (xsd) file my operation parameter generates minoccur=0.
How do I get the parameter to generate required?

xsd code generated:
xs:element name="updateVehicleInspectionDataResponse" type="tns:updateVehicleInspectionDataResponse" />
- <xs:complexType name="updateVehicleInspectionData">
- <xs:sequence>
<xs:element name="vinNumber" type="xs:string" minOccurs="0" />
<xs:element name="sequenceNumber" type="xs:int" />
<xs:element name="passFailIndicator" type="xs:string" minOccurs="0" />
</xs:sequence>
</xs:complexType>

thank you