cubicweb #509109 transitivity of relationships [open]

A relation R is transitive if R(a,b) and R(b,c) implies R(a,c). Having a 'transitive' property for relations would make it easier to deal with hierarchies for example. We would say "descendant_of: subject='Keyword', object='Keyword', transitive=True" and there would be no need to define the hooks that compute all the implications of a new relation as we do now.

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