RULE structural_class_rejection_has_at_least_one_role_references

(* SCHEMA step_ship_schema; *)

-- ONLY IN AP218
RULE structural_class_rejection_has_at_least_one_role_references FOR (
             group, applied_document_reference,
             applied_classification_assignment);

    LOCAL
      violation : LOGICAL := FALSE;
      t1_set    : SET OF group := [];
      c_a_set   : SET OF applied_classification_assignment := [];
      t2_set    : SET OF applied_document_reference := [];
    END_LOCAL;
    c_a_set := QUERY ( i <* applied_classification_assignment | (i.
        assigned_class.name = 'structural class rejection') );
    REPEAT i := 1 TO HIINDEX(c_a_set) BY 1;
      REPEAT j := 1 TO HIINDEX(c_a_set[i].items) BY 1;
        t1_set := t1_set + c_a_set[i].items[j];
      END_REPEAT;
    END_REPEAT;
    REPEAT i := 1 TO HIINDEX(t1_set) BY 1 WHILE NOT violation;
      t2_set := bag_to_set(USEDIN(t1_set[i],
          'STEP_SHIP_SCHEMA.APPLIED_DOCUMENT_REFERENCE.ITEMS'));
      violation := SIZEOF(QUERY ( t2_inst <* t2_set | (t2_inst.role.name =
           'explanations') )) < 1;
    END_REPEAT;

  WHERE
    wr1: (NOT violation);

END_RULE;

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