A. Observation DateTime

Each Item in the Content Sequence (0040,A730) of the SR Document Content Module that is a target of a "CONTAINS" relationship from the root node, i.e., the first level Log Content Items, shall include the Observation DateTime (0040,A032) as a Type 1 attribute. This attribute shall represent the DateTime at which the event recorded in the Content Item occurred, not the time at which the Item was recorded.

The first level Procedure Log Content Items in the Content Sequence shall be strictly ordered by monotonically increasing Observation DateTime (0040,A032) values.

The Observation DateTime (0040,A032) shall be specified to a precision of one second or finer.