FUNCTION acyclic_experience_relationship
(relation : experience_relationship, relatives : SET [0:?] OF experience, specific_relation : STRING) : BOOLEAN;
LOCAL
x : SET OF experience_relationship;
END_LOCAL;
IF relation.relating_experience IN relatives THEN
RETURN (FALSE);
END_IF;
x := QUERY(expr <* bag_to_set(USEDIN(relation.relating_experience, 'EXPERIENCE_SCHEMA.' + 'EXPERIENCE_RELATIONSHIP.' + 'RELATED_EXPERIENCE')) | specific_relation IN TYPEOF(expr));
REPEAT i := 1 TO HIINDEX(x);
IF NOT acyclic_experience_relationship(x[i], relatives + relation.relating_experience, specific_relation) THEN
RETURN (FALSE);
END_IF;
END_REPEAT;
RETURN (TRUE); END_FUNCTION; -- acyclic_experience_relationship
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