Q1:Difference between concrete wsdl and abstract wsdl
Typically a wsdl contains – types, Messages, porttype, Binding and service
Using Types ,messages and porttype we can’t do anything with that.. which is abstract part. Binding and service has more info about the webservices. So it’s concrete.abstract wsdl is enough to consume a soap service … If we use a abstract wsdl and if we try to generate classes we will not be able to see the java files and only class files can be obtained …
Concrete wsdl can provide complete details about the service…

It is not safe to provide the concrete wsdl to the consumer if he is not to be trusted ..
Please Refer Here

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