Enriching 3D models with data/text/links

A client has asked if we can add info to the obj file to enrich the 3D models. So ideally having the ability to add specific text/info/graphics to specific points on the model that can then be clicked on to view info. Can you offer some advice on the best way to add these kind of layers?

I’m not very sure how to do this the way you’re describing. I think 3D PDFs can accomplish this.