Ask the expert leadsled.
Folks,
Maybe underfire doesn't know himself.
Maybe he thinks he is being helpful in letting us know that UAT and 1090ES don't talk to each other, but he might have added in that VDL-4 ( quite extensively used in US and Scandinavia --- the first ATC certified use of ADS-B was the VDL-4 system)
Actually, he (or is it she) isn't telling us anything we haven't known for many years, 15 at least.
Tootle pip!!
PS: An in depth 0.5 second search revealed the below nor very recent info.
https://www.google.com/url?sa=t&rct=...60444564,d.dGI