a specification of a point in absolute calendar time, at the resolution of one day.
(Inherited-Facet-Value Slot-Value-Type
Conference
Conf.Date
Calendar-Date)
(=> (Conference ?X)
(And (Value-Cardinality ?X Conf.Name 1)
(Value-Type ?X Conf.Name Biblio-Name)
(Value-Cardinality ?X Conf.Organization 1)
(Value-Type ?X Conf.Organization Organization)
(Value-Cardinality ?X Conf.Date 1)
(Value-Type ?X Conf.Date Calendar-Date)
(Value-Type ?X Conf.Address City-Address)
(Maximum-Value-Cardinality ?X Conf.Address 1)))
(=> (Conf.Date $X $Y) (Calendar-Date $Y))