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For reasoning about the relations between temporal intervals, Allen's interval algebra provides a [[Relation composition|composition]] table. Given the relation between <math>X</math> and <math>Y</math> and the relation between <math>Y</math> and <math>Z</math>, the composition table allows for concluding about the relation between <math>X</math> and <math>Z</math>. Together with a [[converse relation|converse]] operation, this turns Allen's interval algebra into a [[relation algebra]].
For the example, one can infer <math>\mbox{newspaper } \mathbf{\{ \operatorname{<
==Extensions==
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