SP500215 NIST Special Publication 500-215: The Second Text REtrieval Conference (TREC-2) Appendix B: System Features Appendix National Institute of Standards and Technology D. K. Harman CONSTRUCTION OF INDICES, KNOWLEDGE BASES, AND OIlIER DATA STRUCTURES -- DATA BUILT FROM OIlIER SOURC [OCRerr]M NAME ] CITY ] ERIM ] TMC J CITRI ( UCLA J SEC [OCRerr] ETh ] One manaully built file [OCRerr]uilt Auxiliary Files (for each system) None Yes [4] ___________ No ndependent or Mostly very ;pecific Mostly very general [1] __________ __________ _________ general [1] __________ Synonym classes, go Synonym classes, go phrases, stopwords & phrases, stopwords [OCRerr]le semi-stopwords [2] ________ & semi-stopwords [2] __________ _________ rage(MB) «1MB «1MB Concepts -1500 1200 [OCRerr]presentation look up table I[OCRerr]k up table Manually built - Manually built nputer Build Time (Hours) "compiled" at runtime, "compiled" at [OCRerr]1 sec. runtime, [OCRerr]1 sec. time to_Modily_(Hours) ____________________ _________ _________ ________ ________________ `ime to Build Not recorded [3] __________ __________ _________ Not recorded __________ ime to Modily _____________________ __________ Manual using texi editor Manual using te[OCRerr] anual labor (*) editor built Auxiliary Files No None No No `~le rage (MB) __________________ ________ [OCRerr]f Concepts ________________ ~epresentation Mostly manually built using special interface Mostly machine built with manual correction Initial core manually built to `bootstrap" for completely macbine-built completion Other