@inproceedings{makinson2003input,
  abstract = {We explain the raison d'etre and basic ideas of input/output logic, sketching the central elements with pointers to other publications for detailed developments. The motivation comes from the logic of norms. Unconstrained input/output operations are straightforward to define, with relatively simple behaviour, but ignore the subtleties of contrary-to-duty situations. To deal with these more sensitively, we constrain input/output operations by means of consistency conditions, expressed in the concept of an outfamily. However, this is a more complex affair, with difficult choices between alternative options.},
  author = {Makinson, D. and van der Torre, L.},
  booktitle = {Foundations of the Formal Sciences II: Applications of Mathematical Logic in Philosophy and Linguistics, Papers of a Conference Held in Bonn, November 10-13, 2000},
  organization = {Kluwer Academic Pub},
  pages = {163},
  title = {What is input/output logic?},
  url = {http://icr.uni.lu/leonvandertorre/papers/fotfs03.pdf},
  year = {2003},
  bdsk-url-1 = {http://icr.uni.lu/leonvandertorre/papers/fotfs03.pdf}
}