1005.7.1 doors (typical door restrictions)

door restrictions are that a out’s ring door into a corridor has to leave 1/2 required width at the most open point on the door from what i can gather. the illustration shows a fully open door with an additional notation that the handle cannot protrude more than 7” off the wall. then there is a comment in the commentary that shows an illustration of the same corridor but with an alcove for a door and states “minimum width is equal to the required width minus 7” and 1/2 required width”. and the illustration shows a door open at 90 degrees. i’ve seen this like three different ways and don’t understand what they are requiring. anyone know? also, other than 1/2 required width clear for the outswing of a door i guess this is it for what i need to know about doors in hallways? excepting that door to door sequence stuff where they are in a row?