...
However, in some particular cases (e.g. mobile or temporary obstacle) it might be necessary to provide the information about the obstacle owner within the data set, in order to enable the airspace users to contact the owner and find out if the obstacle is present at a certain moment in time. For that purpose, the contact details of the obstacle owner can be mapped to a Note associated with the VerticalStructure VerticalStructure.annotation.Note
Note: For difference between Data Originator Identifier and Data Source Identifier see Basic properties for obstacles#,Data%20source%20identifier,-Data%20source%20identifier
Example 1: Operator/Owner
...