IF (SIZEOF(QUERY(pdr <* USEDIN (item, 'PRODUCT_STRUCTURE_SCHEMA.PRODUCT_DEFINITION_RELATIONSHIP.' + 'RELATED_PRODUCT_DEFINITION') | 'PRODUCT_STRUCTURE_SCHEMA.ASSEMBLY_COMPONENT_USAGE' IN TYPEOF(pdr))) = 0) THEN RETURN(TRUE);ELSE RETURN (FALSE);END_IF;