The wall coordinates, a length-4 array of finite numbers [x0,y0,x1,y1]
The illumination restriction type of this wall
The movement restriction type of this wall
The visual restriction type of this wall
The auditory restriction type of this wall
The direction of effect imposed by this wall
The type of door which this wall contains, if any
The state of the door this wall contains, if any
Configuration of threshold data for this wall
An object of optional key/value flags
The _id which uniquely identifies the embedded Wall document