Windchill integration with Ariba or any other Procurement/Sourcing Management Solutions

Dear all,

For anybody out there who has experience integrating Windchill PDMLink with SAP Ariba (or any other Procurement/Sourcing Management Solutions) would you be so kind to reach out to me and provide me some details about:
- Customer project
- How the integration has been realized (which exact integration tools, etc.)

- If it concerns unidirectional or bidirectional integration

- What exact information the integration interfaces

Many thanks for your help in advance.

Guido Banning.