Maintaining knowledge about temporal intervals

@article{Allen1983MaintainingKA,
  title={Maintaining knowledge about temporal intervals},
  author={James F. Allen},
  journal={Commun. ACM},
  year={1983},
  volume={26},
  pages={832-843}
}
An interval-based temporal logic is introduced, together with a computationally effective reasoning algorithm based on constraint propagation. This system is notable in offering a delicate balance between 
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