Allen's interval algebra: Difference between revisions

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m Temporal statements in the field of cultural heritage: added clarification about disjunctions of Allen relations in CIDOC CRM
m Temporal statements in the field of cultural heritage: clarified that disjunctions are not forbidden but simply cannot be expressed in CIDOC CRM
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* The reign/life of Harold II ''ends before or with the end of'' the Battle of Hastings
 
In the example, it is not necessary to specify whether Harold II was killed at the beginning or during or at the end of the battle, i.e. whether <math>X \mathbf{\operatorname{m}} Y</math>, <math>X \mathbf{\operatorname{o}} Y</math> or <math>X \mathbf{\operatorname{fi}} Y</math> applies (CIDOC CRM deliberately does not allow disjunctions such as <math>\mathbf{\{ \operatorname{m}, \operatorname{o}, \operatorname{fi} \}}</math> cannot be expressed in CIDOC CRM, except in queries). If it is relevant for a particular historical question, it can be specified later by adding e.g. ''ends after the start of''.
 
Another difference is that for temporal, spatial and spatiotemporal statements in CIDOC CRM, the edges (i.e. for temporal statements the start and end) are interpreted as fuzzy. Especially statements about exact simultaneity are otherwise extremely rare and notoriously difficult to attest.