Originally Posted by
lafleur
Yes, all good points. But when we are creating, say, our process piping or electrical sheets, it would be really crazy to have to start attaching every xref individually to each one, when we need to see everything on all of them, beginning with the architecture and building on up through the process equipment to the piping, electrical, etc. Generally, our base is axref + pmxref + discipline specific xref which is then brought in to the individual drawings. All attached rather than overlaid. If there's a problem, it's simple enough to open each of those refs in turn, beginning with the base - which, logically, is the building - audit/purge/etc. Then clean xrefs are brought in to each subsequent level when it's opened or reloaded.