Hi I think with SP3 there is a workaround for this I just found out. I doesn't work optimally but it still works. I attached records to my material 2d sybmol then I created a symbol of that symbol (MASTER) you are able to change the value in the worksheet of the instance and when you copy/paste the master in another file of drag it out of your recourse manager the assigned data stays the same.
Hope this helps
DATABASE TEST.vwx