31. The generalization to partial orders was introduced by. 32. The reason is, again, that in general \ leq is only a partial order on S. 33. Ontological dependency is a relationship known mathematically as a partial order set relation ( poset ). 34. It may be interpreted as the clique complex of the comparability graph of the partial order . 35. In that case, this partial order could be used to form a partial order between actions. 36. In that case, this partial order could be used to form a partial order between actions. 37. There are two equivalent ways of asserting that the universe is asymmetric, hence a strict partial order . 38. For this reason a more general understanding of the computational topology is provided through complete partial orders . 39. Some authors require \ leq to also be antisymmetric, so that the relation is a partial order . 40. Some use the term partial order anyway, conflicting with standard terminology, while some use the term preorder.