Term Kind Topic What it is
Architecture Documentation practice Architecture Documentation Writing down the decisions and their reasoning at an altitude that stays true long enough to be worth reading.
Architecture Viewpoint concept Architecture Documentation A perspective on a system tailored to the concerns of a particular audience, recognising that no single diagram serves everyone.
Documentation Half-Life Doc Decay, Staleness Rate concept Architecture Documentation The observation that architecture documentation decays in proportion to how much it restates current structure, and that the artefacts which survive are the ones that were always historical.