Synchronization - We're using the word Synchronization to talk about keeping a non-Chandler data store in sync with a Chandler User Repository, or to talk about keeping items in sync between two User Repositories, if those items have been shared using True Trash.SharingGlossary?. Synchronization is different from Replication, which is what a person uses to automatically sync two or more User Repository Replicas in a Replica Set.