CompanyDirectorEmployee.cql in activefacts-0.8.5

- old
+ new

@@ -23,14 +23,16 @@
 Person is identified by given-Name and family-Name where
 	Person has one given-Name,
 	given-Name is of Person,
 	family-Name is of Person,
 	Person is called at most one family-Name;
-Person was born on at most one birth-Date;
+Person was born on at most one birth-Date restricted to {'1900/01/01'..};
+
 Attendance is where
 	Person (as Attendee) attended Meeting,
 	Meeting was attended by Attendee;
+
 Directorship is where
 	Person (as Director) directs Company,
 	Company is directed by at least one Director;
 Directorship began on one appointment-Date;
 
@@ -44,8 +46,6 @@
 Manager is ceo;
 
 /*
  * Constraints:
  */
-for each Employee exactly one of these holds:
-	that Employee is ceo,
-	that Employee is supervised by some Manager;
+either that Employee is ceo or that Employee is supervised by some Manager but not both;