ISR11 Operating Instructions for the SMART Text Processing and Document Retrieval System chapter M. E. Lesk Harvard University Gerard Salton Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government. 11-19 e) a deck of the rank lists for each request, punched in the correct format for the [OCRerr]RVAL evaluation program (part 6.2). 3.7. Document-Document [OCRerr]xpansion After performing the initial request-document correlation, it is possible to au[OCRerr]i[OCRerr]ent the list of answers throu[OCRerr] a correlation of the documents with each other. Documents which exhibit a high correlation with documents already identified as 1tanswers" can thus be retrieved. The specifications used in this process are: DOCDOC this specification indicates that a document-document correlation is to be performed; [OCRerr]DEDD a selects the correlation mode for document-document correlation as 005 or OVLAP; 005 is the normal mode; CU[OCRerr][OCRerr]D x sets the cutoff for document-document correlation to x, a n[OCRerr][OCRerr]ber between 0.0 and 1.0. The normal value is 0.5. 3.8. Other Specifications DOCTAP this specification indicates that looked-up documents appear on tape [OCRerr], in the format prepared by the [OCRerr]CTAP program (part 5.2). These documents will be read by the SMART progrsms, and are used as if they were included in the normal input tape; ADNE XL this specification sets the S[OCRerr]RT tape A0[OCRerr] to [OCRerr]RTRAN logical tape number n. Normally n = 1; ATWO, ..., BSIX these specifications change the other tape specifications. Normal settings are shown in Table 1; AQAIN this specification indicates that another set of specifications follows this run on the input tape. S[OCRerr]T