This element specifies the runtime settings for a web service reference. Runtime information is only needed in the following cases:
To define the port used to resolve a container-managed port
To define the default Stub/Call property settings for Stub objects
To define the URL of a final WSDL document to be used instead of the one associated with service-ref in the standard Java EE deployment descriptor
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 Element  | 
 Required  | 
 Description  | 
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 only one  | 
 Specifies the web service reference name relative to java:comp/env  | 
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 zero or more  | 
 Specifies information for a port within a web service reference  | 
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| 
 zero or more  | 
 Specifies JAX-RPC property values that can be set on a javax.xml.rpc. Call object before it is returned to the web service client  | 
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| 
 zero or more  | 
 Specifies the name of the generated service implementation class  | 
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| 
 zero or one  | 
 Specifies the WSDL service element that is being referenced.  |