This post includes hierarchy of public to private spaces.

Public here is defined as the space that is open to all the public , all the people no specific audience is denied from being in that space.

Public/private is defined as the space the is closer to the public area but it is not absolute public so its like a transitional space ( buffer zone/filtering zone) before reaching the private space. (semi-public space)

Private/Public space is defined as the space that is closer to the private areas that the pubic one meaning; that it is a private space for certain criteria/audience but not absolute private fir individuals. ( semi-private space)

Private is defined as a space that only certain/specific audience are allowed inside