Spec pdf doesn't mention about EndpointContext. There is a brief reference to it in section 6.6 (HTTP SPI). API's javadoc has the necessary info but it would be nice if the spec reflects it.
Will add the following to spec
EndpointContext allows an application to associate multiple endpoints and this enables a JAX-WS implementation to share any runtime information about those endpoints with one another. For example, if an application has multiple endpoints corresponding to multiple ports in a WSDL, an implementation can publish the WSDL with the addresses of those ports. An application need to call setEndpointContext(EndpointContext) method to set the context on all the related endpoints before publishing those endpoints.