Allowable states transitions

The following table lists the permissible state transitions for a synchronization request. It also shows when application interface objects and requests are locked for update.

Initial state	New state	Changed by	Preconditions	Object locking
None.	New	An application interface object when a request creation is initiated by a user or workflow action.	The requestor must have write access to the application interface object.	None.
New	Processing	An application interface object during generation of PLM XML for the request.	None.	The application interface object is locked for updating.
Processing	Pending	An application interface object after processing is complete.	The request is successfully processed.	The application interface object is unlocked.
Pending	Communicating	AI service on a call to start data exchange.	The request has export access rights.	The request is locked to update and to retrieve files.
Communicating	Completed	AI service on a call to end data exchange.	The file transfer is complete.	The request is unlocked.

The following table lists the permissible state transitions for a Publish request. It also shows when application interface objects and requests are locked for update.

Initial state	New state	Changed by	Preconditions	Object locking
None.	New	An application interface object when a request creation is initiated by a user or an AI service request to create a Publish request.	The requestor must have write access to the application interface object. There must be no pending synchronization request.	None.
New	Communicating	AI service on a call to start a data exchange.	None.	The request is locked to update and to retrieve files.
Communicating	Pending	AI service on a call to end a data exchange.	The file transfer is complete.	The request is unlocked.
Pending	Processing	An application interface object triggered by a user or workflow action.	The request has import access rights to the request object. There must be no pending synchronization request.	The application interface object is locked for updating.
Processing	Completed	An application interface object after processing is complete.	Processing is complete.	The application interface object is unlocked.