IRS13 Search Matching Functions chapter E. M. Keen Harvard University Gerard Salton Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government. 111-56 DATA SUPPLIED I[OCRerr]S [OCRerr]UCTIONS REQUEST AND NON-MATCHING MATCHING CONCEPTS DOCUMENT CONCEPTS 1. Concept numbers 1. No information given 1. Objective is a high with weights only. about this. precision perfor- mance. 2. Concept numbers with 2. Total number of con- 2. Objective is a high weights plus indica- cepts, average weight, recall performance. tion of highly weigh- and sum of squares of ted request concepts weights given. according to impor- tance. 3. Concepts and weights 3. All concepts and decoded into actual weights given and words. decoded into words. Variables for a hand ranking test in which persons would rank documents in relation to search requests in order to develop insight into desirable matching functions. Figure 36.