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In an environment where Microsoft BizTalk ESB Toolkit is deployed, a BizTalk receive location responsible for receiving ESB-destined messages is referred to as an "on-ramp." To configure a standard BizTalk receive location to an ESB on-ramp, associate the receive location with one of the pipelines provided as part of the toolkit, and then correctly configure the components of that pipeline to determine or read the itinerary for the inbound message, depending on your scenario.
An ESB "off-ramp" corresponds to a BizTalk dynamic send port. As an itinerary is being processed, values are promoted to the context properties of the associated message using the System-Properties.xsd schema. The BizTalk publish-subscribe mechanism uses these promoted properties to route a message through a dynamic send port (off-ramp) to complete a message delivery.
The following table lists the on-ramps that are provided by the Microsoft BizTalk ESB Toolkit.
| Name | Message exchange pattern | Description |
|---|---|---|
| ESB.ItineraryServices | One-Way | ASMX on-ramp; expects ESB itinerary content in SOAP header. |
| ESB.ItineraryServices.Response | Request-Response | ASMX on-ramp; expects ESB itinerary content in SOAP header. |
| ESB.ItineraryServices.WCF | One-Way | Windows Communication Foundation (WCF) on-ramp; expects ESB itinerary reference in SOAP header. |
| ESB.ItineraryServices.Response.WCF | Request-Response | WCF on-ramp; expects ESB itinerary reference in SOAP header. |
| ESB.ItineraryServices.Generic.WCF | One-Way | WCF on-ramp; expects request message only. |
| ESB.ItineraryServices.Generic.Response.WCF | Request-Response | WCF on-ramp; expects request message only. |
Microsoft BizTalk ESB Toolkit on-ramps that are not ASMX should be configured to select ESB itineraries. For more information about how to select an ESB itinerary, see Using a Pipeline Component to Select an Existing Itinerary.