FUNCTION acyclic_action_relationship
(relation : action_relationship, relatives : SET [1:?] OF action, specific_relation : STRING) : BOOLEAN;
LOCAL x : SET OF action_relationship; END_LOCAL;
IF relation.relating_action IN relatives THEN RETURN (FALSE); END_IF; x := QUERY(actn <* bag_to_set(USEDIN(relation.relating_action, 'ACTION_SCHEMA.' + 'ACTION_RELATIONSHIP.' + 'RELATED_ACTION')) | specific_relation IN TYPEOF(actn)); REPEAT i := 1 TO HIINDEX(x); IF NOT acyclic_action_relationship(x[i], relatives + relation.relating_action, specific_relation) THEN RETURN (FALSE); END_IF; END_REPEAT; RETURN (TRUE); END_FUNCTION; -- acyclic_action_relationship
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