Where to find BLE GATT specification xml in 2020?

When to build BLE related app, it seems that it's essential to have detail information from GATT XML specifications.

When I look for the XML files, I always end up going to here, but there is no XML I can find on the page.
Then I later found this page, saying their XML viewer is no longer maintained and check the "XML files directly", but I still don't see any links to the XMLs.

So far the best I found are

github repo but this one is pretty old
xml viewer? but this is only one part of the many
specs but they are not XML files

Where is the central source for the XML files they are talking about?

Solution

The Bluetooth SIG seem to be moving away from having the details in an XML format. I find myself using the following documents to find the information I am looking for:

"GATT Specification Supplement" at https://www.bluetooth.com/specifications/gatt/

"16-bit UUID Numbers Document" at https://www.bluetooth.com/specifications/assigned-numbers/