represent dynamic obstacles in a map

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Hi all,

I am working on creating a map (occupancy_grid_map) for navigation of a single floor of a building and I am wondering what is the best way to represent obstacles like doors which are not static in the map. Is there any standard way to take care of such obstacles? If not, what is the best way to go about it? One way which I can think of is to just represent these obstacles as free space and the robot can treat them as obstacles (which are not on the map) when it encounters them. I would like to know if there is a better way to take care of such obstacles in the map.

Thanks in advance.
Naman Kumar