IRS13 Document Length 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. v-38 ORDER OF MERIT OF DOCUMENT NUMBERS OF LENGTHS USING RANK POSITIONS RELEVANT WORST MIDDLE BEST DOCUMENTS A B C D E F Title - Abstract - Text Abstract - Title - Text Text - Title - Abstract Title - Text - Abstract Abstract - Text - Title Text - Abstract - Title 47 27f xx >7> 74 43 53 Rank position merit of 170 individual documents relevant to 35 requests comparing title, abstract and full text, Stem dictionary, ADI Collection. Figure 25.