A GRAVITY application can be invoked by another GRAVITY application.
The illustration below shows an example of a process diagram that uses the 
INPUT OTHER PROJECT or 
OTHER PROJECT CALL operator.
Using this operator makes the project path begin with the invocation of another GRAVITY application started by it. As a result of using this operator and executing the specified GRAVITY application, the output of the INPUT OTHER PROJECT or OTHER PROJECT CALL operator contains the data stream (data bus) produced by the selected output operator (OUTPUT type) of the invoked project.