The pre-transformation extension point is invoked before the main transformation is executed. This transformation will help in transforming the source XML coming as an input to the integration process.

The integration layer defines an external call from the pre-transformation extension point which accepts the source XML as input and gives the source XML as output. The WSDL the integration layer points to an abstract WSDL and can be plugged in by a concrete WSDL by the implementation team. This helps the implementation to invoke any external web service and transform the input XML.