Web services on Domino - several questions

Let me ask these question about web services on Domino:

What version of WS-I is it compliant with? (if any…)

What version of WSDL/SOAP does it support?

What is the version of Apache Axis built into Domino?

Why is not possible to import WSDL with one-way and empty operations (“genDigestsLS failed to obtain serviceObj” error)?

Why is the NotesWebServiceEngine class undocumented and hidden in a .lss file?

What is the purpose of this directive: %If WEB_SERVICE_CONSUMER_SCRIPTLIB

Thanks,

Tomas.