rpn_get_top_approx_limit(zh, rpn->RPNStructure, &sset->approx_limit);
res = rpn_search_top(zh, rpn->RPNStructure, rpn->attributeSetId,
rpn_get_top_approx_limit(zh, rpn->RPNStructure, &sset->approx_limit);
res = rpn_search_top(zh, rpn->RPNStructure, rpn->attributeSetId,