An update event signalling a write operation, which may have been transacted locally in this clone, or remotely on another clone.
Partial subjects, containing properties that have been deleted from the domain. Note that deletion of a property (even of all properties) does not necessarily indicate that the subject's identity is not longer represented in the domain.
Partial subjects, containing properties that have been inserted into the domain.
Current local clock ticks at the time of the update.