Just like for books, music, software, movies: - if it's an exact copy, give attribution - if it's inspired-by but different, say it - if it's a new thing, do

Just like for books, music, software, movies: - if it's an exact copy, give attribution - if it's inspired-by but different, say it - if it's a new thing, don't give false attribution (e.g. with a misleading name) - if the origin is forgotten or unclear, don't claim ownership