Something I originally put together a while back whilst working on heritage data ontologies. This one covers window frame types and some issues in heritage glass. This one is still useful in distinguishing between different types of glass and window type for heritage. I used it again today with a client. Although specifically for the Palace of Westminster job, it has proved useful in trying to work out #Uniclass2015 and #COBie for workers who are unfamiliar with wider #BIM data collections.