rel and rev attribute values, with counts of number of pages on which they occur, out of 127249 random text/html pages from dmoz.org downloaded on 2008-02-26: (UPDATE: Actually it looks like it's not just text/html pages, it includes others too. Oh well.) 57110 12210 7710 3799 3599 3024 2401 1451 1450 1411 1177 1157 932 845 720 663 619 614 554 537 401 389 331 328 327 307 298 293 276 270 246 240 238 215 214 202 188 182 149 127 112 107 97 83 79 77 77 76 72 66 60 59 57 57 54 53 51 48 47 47 47 35 34 34 33 31 30 30 29 28 26 26 26 26 26 25 25 25 24 24 23 23 23 23 21 20