b-space or b type space

A b-type space is space with more than one link but which forms part of a connected sub-system in which the number of links is one less than the number of spaces, that is, a system which has the topological form of a tree. Such space cannot in itself be dead end space, but must be on the way to (and back from) at least one dead end space.

Sources

Hillier, B. (1996, 2007), Space is the Machine: A Configurational Theory of Architecture. Space Syntax: London, UK. pp.250