FUNCTION acyclic_product_relationship
(relation : product_relationship, relatives : SET [1:?] OF product, specific_relation : STRING) : BOOLEAN;
LOCAL x : SET OF product_relationship; END_LOCAL;
IF relation.relating_product IN relatives THEN RETURN (FALSE); END_IF; x := QUERY(prod <* bag_to_set(USEDIN(relation.relating_product, 'PRODUCT_DEFINITION_SCHEMA.' + 'PRODUCT_RELATIONSHIP.' + 'RELATED_PRODUCT')) | specific_relation IN TYPEOF(prod)); REPEAT i := 1 TO HIINDEX(x); IF NOT acyclic_product_relationship(x[i], relatives + relation.relating_product, specific_relation) THEN RETURN (FALSE); END_IF; END_REPEAT; RETURN (TRUE); END_FUNCTION; -- acyclic_product_relationship
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