The Web Services Provider is the provider entity of the PowerCenter web service framework that makes PowerCenter workflows and data integration functionality accessible to external clients through web services.
The Web Services Hub is an application service in the PowerCenter domain that uses the SOAP standard to receive requests and send responses to web service clients. The Web Services Hub interacts with the Integration Service and the Repository Service to process requests and generate responses. When the Web Services Hub sends or receives messages to or from external clients, the source service publishes the messages as events and posts the events to the corresponding topics.