Hähner, JörgBecker, ChristianMarón, Pedro JoséDadam, PeterReichert, Manfred2019-10-112019-10-1120043-88579-379-2https://dl.gi.de/handle/20.500.12116/28876John entered his office. John left his office. The order of these updates to a context-aware system is important to reflect the state in the real world. Context information obtained by sensor systems requires consistency concepts which reflect the chronological ordering in which context information has been captured. This paper introduces a consistency concept which allows to express the ordering of events which happened outside of a computer system.enText/Conference Paper1617-5468