Doing some reserach for one of our designers. He designs security systems i.e. cameras, card readers keypads etc. What he wants to be able to do, is have the CAD operator layout a drawing with X number of cameras numbered sequentially. Each camera block will have a number of attributes (including the camera number). He would like that info exported to an excel table which would list the camera number and the associated attributes. He would then fill in the attribute information in excel, and the CAD operator would then import the excel schedule back into AutoCAD which would update the blocks attribute information. In simpler words, linking block attributes to excel spreadsheets. I am am looking for some resources to read up on this type of thing (if it is even possible)