SP500215 NIST Special Publication 500-215: The Second Text REtrieval Conference (TREC-2) Incorporating Semantics Within a Connectionist Model and a Vector Processing Model chapter R. Boyd J. Driscoll National Institute of Standards and Technology D. K. Harman FI[OCRerr] Ust Item First Entry Second Entry Third Entry Number Word & Frequency Word & Frequency Category in Query in Document #4 1 (depart,1) ( 2 (de[OCRerr]rt,1) ( 3 (depart,1) ( 4 (depart,1) ( 5 (do1l) (i 6 (station,1) ( 7 (station,1) 8 (station,1) 9 (station,1) (((mm 10 (station,1) ( 11 (station,1) ( 12 (stntion,1) ( 13 (station,1) ( 14 (the,1) 15 (tmins,1) 16 (tmins,1) (] 17 (trains,1) 18 (trains,1) (i 19 (trains,1) (i 20 (trains,1) (i 21 (when,1) (I 22 (when,1) (] 23 (when,1) (] 24 (when,1) (I Ienve,1) AMDR [OCRerr]ns,1) AMDR Icave,1) TAMr station,1) TAMr Irains,1) TCNV itation,1) APOS Btation,1) AORD Imins,1) AORD Ieave,1) TAM[OCRerr] [OCRerr]tntion,1) TAMr [OCRerr]tation,1) TCND [OCRerr]tation,1) TDGR stntion,1) TSPL Ihe,1) trains,1) AORD Icave,1) AMDR trains,1) AMDR trains,1) AMFR Lmins,1) TACM trains1l) TCNV Ienve,1) TAMr hourly1l) TrIM r'oon,1) TrIM [OCRerr]ntiI,1) TrIM Figure 12. Common Meaning. Second Ust Item First Entry Second Entry Third Entry Number Word & Frequency Word & Frequency Category in Query in Document #4 1( 2( 3( 4( 5 6 7 8 9 10 11 12 ( 13 ( 14 ( 15 ( 16 ( 17 ( 18 ( 19 ( 20 ( 21 ( 22 ( 23 ( 24 ( 1eave,1) (Ieave,1) AMDR ,tmins,1) (tmins,1) AMDR *ienve,1) (Ieave,1) TAMr station,1) (station,1) TAMT `tmins,1) (trains,1) TCNV station,1) (station,1) APOS `station,1) (stntion,1) AORD `station,1) (tmins,1) AORD stadon,1) (Ienve,1) TAMT station,1) (stntion,1) TAMT station,1) (station,1) TCND station,1) (stndon,1) TDGR stntion,1) (station,1) TSPL the,1) (the,1) trains,1) (trains,1) AORD trnins,1) (Ieave1l) AMDR tmins,1) (tmlns,1) AMDR tmins,1) (tmins,1) AMFR tmins,1) (tnins,1) TACM tmins,1) (tmins,1) TCNV Ienve,1) (`eave,1) TAM[OCRerr] bourly,1) ("oudy,1) TrIM i'oon,1) (noon,1) TrIM `intil,1) (until,1) TrIM Figure 13. Adjustment for Words with no idf 298