PI-Independent Enterprise Services 
SAP Supplier Relationship Management (SAP SRM) provides a number of PI-independent enterprise services. These are based on the Web Service Reliable Messaging (WSRM) protocol. WSRM enables point-to-point communication between SAP Business Suite applications for asynchronous enterprise services with compatible signatures. If you use WSRM, communication between the platform components no longer requires the installation of an integration server, such as SAP NetWeaver Process Integration (SAP NetWeaver PI).
All enterprise services listed below support both the WSRM protocol and the SAP NetWeaver PI 3.0 protocol. For more information about the enterprise services, see SAP Help Portal at http://help.sap.com .
This function is used in the Service Procurement and Contract Management business scenarios.
Note
The following restriction applies: Supplier self-services (SUS) still requires the installation of SAP NetWeaver PI.
You have performed the configuration steps as described in SAP Solution Manager under .
You have activated the business function Improvements for SOA Reuse Functions (FND_SOA_REUSE_1) and you have defined settings in Customizing under . The business function SRM, PI-Independent Enterprise Services (SRM_WSRM_1) is then automatically activated.
The services provided by SAP SRM that support the WSRM protocol can be grouped as follows:
The following enterprise services use the WSRM protocol for point-to-point communication only:
PurchaseOrderERPContractReleaseNotification_In
PurchaseRequestERPSourcingRequest_In
PurchaseRequestERPSourcingConfirmation_Out
RFQRequestSUITERequest_In
RFQRequestSUITEConfirmation_Out
PurchaseOrderERPRequest_Out_V1
PurchaseOrderERPConfirmation_In
PurchasingContractERPRequest_Out_V1
PurchasingContractERPConfirmation_In
PurchasingContractSRMReplicationConfirmation_In
SupplierInvoiceSUITEContractReleaseNotification_In
AuctionSRMReplicationConfirmation_In
AuctionSRMReplicationRequest_In
AuctionSRMReplicationConfirmation_Out
AuctionSRMReplicationRequest_Out
RFQRequestSRMBidderEnrollmentRequestConfirmation_In
RFQRequestSRMBidderEnrollmentRequestConfirmation_Out
RFQRequestSRMReplicationConfirmation_In
RFQRequestSRMReplicationConfirmation_Out
RFQRequestSRMReplicationRequest_In
RFQRequestSRMReplicationRequest_Out
SupplierQuoteSRMAwardNotification_In
SupplierQuoteSRMAwardNotification_Out
SupplierQuoteSRMCancellationRequest_In
SupplierQuoteSRMCancellationRequest_Out
SupplierQuoteSRMConfirmation_In
SupplierQuoteSRMConfirmation_Out
SupplierQuoteSRMRequest_In
SupplierQuoteSRMRequest_Out
These are services using the WSRM protocol for point-to-point communication and to simulate the Exactly Once In Order (EOIO) handling of SAP NetWeaver PI with the in-application sequencing feature of the reuse layer. EOIO describes the quality of service of a message. Messages with the same queue name are delivered in the same order in which the sender sent them.
The following enterprise service uses the WSRM protocol for point-to-point communication with in-application sequencing:
PurchasingContractSRMReplicationRequest_Out