L0 = <http://www.simantics.org/Layer0-1.1>
L0X = <http://www.simantics.org/Layer0X-1.1>

L0X.Session <T L0.Entity
L0X.Session.HasClientId <R L0.HasProperty : L0.FunctionalRelation
L0X.Session.HasRoleSelection <R L0.IsRelatedTo
L0X.Session.HasUser <R L0.IsRelatedTo : L0.FunctionalRelation

L0X.HasSession <R L0.IsRelatedTo