This enables a knowledgebase to call any other deployed, silent knowledgebase as a decision service. This is useful in scenarios where there is common decision logic to multiple larger decision flows. The common logic can be built and deployed once, and the flows can all call it as needed. This simplifies development and drastically reduces maintenance overhead.
Usage can be considered similar to calling an external web service.
All that is needed is the endpoint for the deployed silent knowledgebase. While stepping through the build tool, this will be called as a test and will prompt for catalog objects to be linked to the inputs and outputs of the silent engine call.
This build tool can be identified by the icon