9.3 Discovery and Synchronization of Resources
For devices under management, the IN-CSE may discover resources of interest (metadata and values) within a device using the ACS.
For resources of interest, the IN-CSE may also express an interest to be notified of a resource if a resource is changed (added, deleted, updated).
The IN-CSE shall be capable to discover and subscribe to changes of resources in order to synchronize the IN-CSE with resources of interest of the ACS.