Siebel Order Management Infrastructure Guide > Product Selection and Pricing Engine >
Calling a PSP Procedure from an External Application
You can invoke a PSP procedure from an external application by using a Web service ASI or a business service API. To call a PSP procedure from an external application
- Create a Web Service ASI or expose a business service API.
- Use the Web Service ASI or business service API to invoke a controller workflow.
- Use the controller workflow to do the following:
- Convert the XML input document to a row set using the XSLT or the Siebel Data Mapper.
- Construct a Context property set (if required) from the XML input document using XSLT or the Siebel Data Mapper.
- Invoke the standard PSP procedure.
- Construct an XML response from the output row set.
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