RULE document_has_at_least_one_references

(* SCHEMA Ship_arrangement_schema; *)



   RULE document_has_at_least_one_references FOR (document );
   LOCAL
      t1_set : SET OF document := [];
      t2_set : SET OF document_representation_type := [];
      violate : LOGICAL := FALSE;
   END_LOCAL;
      t1_set := QUERY (i <* document| VALUE_IN(WHICH_CLASS(i), 'document'));
      REPEAT i := 1 TO HIINDEX(t1_set) WHILE NOT violate;
         t2_set := bag_to_set(USEDIN(t1_set[i], 'SHIP_ARRANGEMENT_SCHEMA.DOCUMENT_REPRESENTATION_TYPE.' + 'REPRESENTED_DOCUMENT'));
         violate := SIZEOF(t2_set) < 1;
      END_REPEAT;
   WHERE
      WR1:
         NOT violate;
   END_RULE;

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2012-03-27T17:16:37-04:00