I watched video, "GEOVIA 3DEXPERIENCECity_Practice City Referentical - Create City Referential & City Experience > Training > 2_Add_datasets in the City Referential"

And there, I think *.shp file, the field name "FILENAME" linked *.3dxc file.
I checked *.3dxc file, and there I saw belows: 
So, how can I make 3dxc, what kind of role, app, software can convert obj to 3dxc?

- belows-
"userData": {"cityData": {
"objects": [{
"STRID": "hotel-dieu",
"generator": "City - to3DX version 7.0.13 April 7 2020",
"uuid": "ae0bfb62-9767-459c-a08a-16148fd77c01",
"fromFile": "Z:\\DS_Paris\\3-sorties\\obj\\batspe\\tutorial\\V2\\geoloc\\hotel-dieu.obj",