Hello,
i give you a simple example how it works.
5e4a9035-6869-4d23-a252-ea26f9292fbb-image.png
Here you see a rule that exports generic location-tag of the type city
3d9b6983-b1c6-4365-bd9e-13a77d112de3-image.png
Now i create a server and assign the location to a city.
d8d0b613-f471-4130-8556-29b784eacd76-image.png
Here you see now the "dynamic-tag". I created a city named _cloud and my server got this tag.
Best regards
Patrick