Hey I have a question. We have some index pages that can be filtered / sorted and paginated. We want SE's to index only index pages with pagination params but ignore and thus not to pass any PR to index pages with sort / filter params in the URL. To the best of my knowledge there are 4 ways of doing it: 1) making these links invisible (e.g. by adding them dynamically with JS). 2) adding rel="noindex" to these links. According to this source "PageRank not passed to destination". 3) adding rel="canonical" meta tag with current page URL sans sort/filter params. 4) using robots.txt syntax to disallow indexing pages with these params, e.g. Disallow: /*?sort=* Disallow: /*&sort=* etc. Last option seems like the easiest site wide solution as you don't have to change any HTML / JS. But I am not sure if disallowing page from indexing would actually prevent from passing PR to these pages IF they have links from within the site that are not rel="nofollow" 'd. Please let me know what you think.