If I push the updated model from Revit via Speckle, and the designers have changed a character in a name, will I loose the mapping or not?
Hi’ @SOP
Yes, you’ll lose the mapping. The EPD mapping is keyed on the combination of the type and material name, so if either of those changes - even a single character — the basis for keeping the mapping is no longer valid.
The important point is that once the identifier changes, we have no way of knowing what actually changed. A single typo correction and a genuine change - say an inner wall becoming an outer wall - look identical to us: both just present as a new identifier. We can’t distinguish a harmless edit from a real change in the building element, so we can’t safely carry the mapping over in either case.
That said, this isn’t the first time we’ve heard this, so we’ve started documenting a process where the user gets to decide whether a change should keep the mapping or not. That way the call is in the hands of the person who actually knows what the change means.
Best,
Martin
1 Like
Nice to hear that you’re working on a process that will this a little easier 
But is SOP’s proposal not a more viable option? That Speckle import is linked to the GUID of the Revit component rather than being linked to both type name and family name? My Revit nerds tell me that every Revit component always is assigned a GUID, which doesn’t change even if you change the name.
This would probably be the most powerfull and useful enhancement of RTLCA to date!!!