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. 111-25 0230 Cran-1, stem dictionary. Overlap Correlation (Logical Vectors) Rank Document Correlation Length 2 79[OCRerr] (Non-Relevant) 0.5000 10[OCRerr] Stem Concepts 2 1OA (Relevant) 0.5000 39 Stem Concepts Cosine Correlation (Logical Vectors) Rank Document Correlation Length 1 iQA (Relevant) 0.1961 39 Stem Concepts 2 31H ([OCRerr]n-Re1evant) 0.1307 39 Stem Concepts Comparison of document lengths using two pairs of relevant/non-relevant documents that are similarly correlated with the search request, using overlap and cosine. Figure 14.