FUNCTION acyclic_representation_relationship
(relation : representation_relationship, relatives : SET [1:?] OF representation, specific_relation : STRING) : BOOLEAN;
LOCAL x : SET OF representation_relationship; END_LOCAL;
IF relation.rep_1 IN relatives THEN RETURN (FALSE); END_IF; x := QUERY(r <* bag_to_set(USEDIN(relation.rep_1, 'REPRESENTATION_SCHEMA.' + 'REPRESENTATION_RELATIONSHIP.' + 'REP_2')) | specific_relation IN TYPEOF(r)); REPEAT i := 1 TO HIINDEX(x); IF NOT acyclic_representation_relationship(x[i], relatives + relation.rep_1, specific_relation) THEN RETURN (FALSE); END_IF; END_REPEAT; RETURN (TRUE); END_FUNCTION; -- acyclic_representation_relationship
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