understanding web services from deploy.wsdd

1) I have axis web service client running and I want to understand some tags which is in deploy.wsdd. they are in the code section:-
2) In which tag of wsdd do we specify the user id and password
3) Does wsdd generate wsdl if yes then how?
4) In which tag we specify request and response parameter and service name.

<typeMapping
        xmlns:ns="http://request.common.xxx.com"
        qname="ns:ReverseZipRequest"
        type="java:com.xxx.ws.ReverseZipRequest"
        serializer="org.apache.axis.encoding.ser.BeanSerializerFactory"
        deserializer="org.apache.axis.encoding.ser.BeanDeserializerFactory"
        encodingStyle=""
      />
      
       <arrayMapping
        xmlns:ns="http://address.yy.nn.xxx.com"
        qname="ns:ArrayOf_tns6_AddressFinderResponseDTO"
        type="java:com.xxx.nn.yy.address.ws.AddressFinderResponseDTO[]"
        innerType="cmp-ns:AddressFinderResponseDTO" xmlns:cmp-ns="http://dto.response.common.yy.nn.xxx.com"
        encodingStyle=""
      />
      
      
       <operation name="getGeoCode" qname="operNS:getGeoCode" xmlns:operNS="http://address.yy.nn.xxx.com" returnQName="retNS:getGeoCodeReturn" xmlns:retNS="http://address.yy.nn.xxx.com" returnType="rtns:GeoCodeLookupResponse" xmlns:rtns="http://response.common.yy.nn.xxx.com" soapAction="" >
        <parameter qname="pns:in0" xmlns:pns="http://address.yy.nn.xxx.com" type="tns:GeoCodeLookupRequest" xmlns:tns="http://request.common.yy.nn.xxx.com"/>
      </operation>
      
      
      
      <parameter name="allowedMethoyy" value="getStandardizedName getCountryFormat getGeoCode getStandardizedAddress findAddress getCityNames doReverseZipLookup doZipLookup ping"/>
      <parameter name="scope" value="Session"/>

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