Thanks for the XML::Compile pointer. XML::Pastor also looks promising, at least from the standpoint of my handing it an XSD for generating Perl code for me. As for SOAP::Lite -- I stopped looking at it when it failed to generate an envelope that the server liked. The envelope was sufficiently different from what does work, I set it aside. I think you are right, however, that the authentication problem is probably easier to solve with SOAP::Lite. Perhaps the envelope problem is worth look at in more detail.

# Handcraft XML -- works.

my $SOAP_UI_MIN = <<'END_SOAP_UI_MIN';
<soapenv:Envelope
  xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"
  xmlns:ser="http://mysrv.xyz.foo.edu/">
   <soapenv:Body>
      <ser:userSearch>
         <firstName>John</firstName>
         <lastName>Smith</lastName>
      </ser:userSearch>
   </soapenv:Body>
</soapenv:Envelope>
END_SOAP_UI_MIN

# Generated by SOAP::WSDL -- works.

my $PSOAP_WSDL_MIN = <<'END_PSOAP_WSDL_MIN';
<SOAP-ENV:Envelope
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" >
   <SOAP-ENV:Body>
     <userSearch xmlns="http://mysrv.xyz.foo.edu/">
       <firstName xmlns="">John</firstName>
       <lastName xmlns="">Smith</lastName>
     </userSearch>
   </SOAP-ENV:Body>
</SOAP-ENV:Envelope>
END_PSOAP_WSDL_MIN


# Generated by SOAP::Lite -- doesn't work.

my $PSOAP_LITE_MIN = <<'END_PSOAP_LITE_MIN';
<soap:Envelope
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/"
 xmlns:xsd="http://www.w3.org/2001/XMLSchema"
 soap:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"
 xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
  <soap:Body>
  <userSearch xmlns="https://mysrv.xyz.foo.edu/idService/userSearchReq
+uest">
    <c-gensym3>
    <firstName xsi:type="xsd:string">John</firstName>
    <lastName xsi:type="xsd:string">Smith</lastName>
    </c-gensym3>
  </userSearch>
  </soap:Body>
</soap:Envelope>
END_PSOAP_LITE_MIN
[download]

The last is rejected with...

Cannot find dispatch method for {https://mysrv.xyz.foo.edu/idService/u
+serSearchRequest}userSearch
[download]

I'm clueless about why SOAP::Lite generates what it does from the WSDL or how to coerce it to generate an acceptable envelope.