SP500215 Appendix B: System Features Appendix National Institute of Standards and Technology D. K. Harman HB. QUERY CONSThUCfloN[OCRerr][OCRerr]MANUALLY CONS'I1LUCI'ED QUERIES (ADHOC) Es: The system does this. It was possible for searchers to influence the weights, but I believe none of them did so (they were not told how to). The default operator (when searcher didn't speci[OCRerr] an op) was a "best-match" opeator utilizing Robertson/Sparck-Jones F4 with a within[OCRerr]document 1 frequency factor and an overall document length factor.