Solution

Microsoft BizTalk Server 2002 provides a rich set of features to use in implementing an automated e-procurement system. On both the hub and the supplier systems, BizTalk Server XLANG schedules are used to implement the business processes and logic required to complete a business transaction.

The following topics describe the flow of documents through both systems, as shown in the preceding illustration.

• Hub: Send Purchase Order to Supplier
• Supplier: Receive PO and Send Invoice to Hub
• Hub: Receive Invoice and Send Payment to Supplier
• Supplier: Receive Payment and Send Acknowledgement to Hub

The following topics describe how BizTalk Server 2002 features are used in this scenario:

• XLANG Schedule Activation
• E-Procurement XLANG Schedule Correlation

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