Shorten WSDL syntax by using defaults - soap

Question

I am a newbie in WSDL syntax so I am just using it in a very basic way, e.g.
<message name="ping_Request">
</message>
<message name="ping_Response">
<part name="response" type="xsd:string" />
</message>
<message name="auth_Request">
<part name="username" type="xsd:string" />
<part name="password" type="xsd:string" />
</message>
<message name="auth_Response">
<part name="response" type="xsd:string" />
</message>
<portType name="ping_PortType">
<operation name="ping">
<input message="tns:ping_Request" />
<output message="tns:ping_Response" />
</operation>
</portType>
<portType name="auth_PortType">
<operation name="auth">
<input message="tns:auth_Request" />
<output message="tns:auth_Response" />
</operation>
</portType>
<binding name="auth_Binding" type="tns:auth_PortType">
<soap:binding style="rpc" transport="http://schemas.xmlsoap.org/soap/http"/>
<operation name="auth">
<soap:operation soapAction="auth"/>
<input>
<soap:body use="encoded" encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" namespace="urn:auth_NameSpace"/>
</input>
<output>
<soap:body use="encoded" encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" namespace="urn:auth_NameSpace"/>
</output>
</operation>
</binding>
<service name="info_Service">
<port binding="tns:ping_Binding" name="ping_Port">
<soap:address location="https://service.example.com/info/info.php"/>
</port>
<port binding="tns:auth_Binding" name="auth_Port">
<soap:address location="https://service.example.com/info/info.php"/>
</port>
</service>
I found my self copying and pasting these blocks for any new function, modifying only the relevant keywords, so I end up with quite a long WSDL even for a relatively small number of functions.
By using WSDL defaults, is it possible to shorten this syntax to a minimum, by removing unnecessary or repeated parameters?
NOTE: this WSDL has to be read by a VB6 soap client library, which has very limited features.