@carpedee: Some samples would be nice (with full folder tree) or it will be just random blind guess. Usually you can guess asset's role via corresponding uasset, except very few cases when it stores some in-between index/database data - but I doubt you'll ever need to deserialize such assets.
Thanks for your reply. Yes, deserializing seems a bit overkill for such a task but you never know.
Sure, I can give you a more precise example.
The assets in question are apparently "rigs" from the game Vampyr : a "facial" rig, a biped-IK rig and a compensation rig (no idea about what this one is). There is also an "adapter" rig which seems linked to the facial rig and facial animations.
Now that's what confuses me. The only rigs assets I could think of would be control rigs (control rig sequences to be exact), but it was a very experimental plugin in UE 4.15 and I don't get how it connects to facial animations and to an "adapter" rig.
I also added an asset of a model from the game, which directly references these rigs, which apparently isn't the case with control rig sequences.
By full tree folder I assume you mean the whole folder hierarchy from the pak file? I can show you a screen of umodel but I'm not sure how to dump the folder structure, if it's even possible?