A datum associated with each digitization that uniquely identifies the time at which the information was recorded. The structure of this item must be fleshed out in conjunction with the DAQ software group, but it is expected to have two components: a finely segmented clock tick and a coarse time bucket.

Unique identifier used to link actions and annotation.

a unique number that gets updated every time a row gets updated

a unique value generated by SQL Server during an update operation

A unique date and time denoting a particular event, such as the saving of a file. Timestamps are used for identification purposes, especially to locate the most recent version of a file, data item, or program. In ORACLE auditing, timestamps can be stored to record the time when a row was created or most recently modified.