Mistakes to avoid
1. Confusing facades with windows
Windows do not count as part of the facade. This can be counter-intuitive, but the color of windows should play no part in deciding the facade color. Also, glass should not be listed as a facade material unless it is used for more than just windows (i.e. it must cover walls or floorplates). Almost every building has windows, so it's pointless to list glass as a facade material unless it really goes beyond windows.
2. Confusing amenities with usages
Usages describe the purpose of an object. Amenities are extra features which enhance the user's experience. So if a hotel has a swimming pool, please list "swimming pool" as a feature... and do not list "swimming" as a usage, because that would make the hotel a sports facility.
3. Abbreviating names and addresses
Please write out full names and addresses as much as possible; for example, write "Street" instead of "St." and "Boulevard" instead of "Blvd.". This is important for consistency as well as for searching and data handling.
4. Confusing historic and revival styles
Each architectural style belongs to a specific time period, with only very unusual cases allowed as exceptions. Many people confuse a historic style with the revival of that style much later. Please do not assign "gothic" to something built in 1870... it should be "neo-gothic" instead. (The Gothic style belongs to the Middle Ages; there are no Gothic buildings in America!)
If you find other common mistakes, please suggest them to be included here!