Entry / Foyer
The threshold volume immediately inside the front door, where arrival happens; the circulation beyond it is `hallway`, and the enclosed airlock in front of it is `vestibule`.
foyer
entrance hall
vestibule
materialgraph ms_room + materialsinuse PROGRAM_SPACE_TYPES
`vestibule` was an altLabel here in the 0.2 draft and is now a term of its own, because the spine carries it separately and the two are genuinely different rooms: a vestibule has two sets of doors and an entry does not. The word is kept in `seenAs` because upstream data really does use it to mean this.