It enables paragraph based linking and paragraph (or sentence) based highlighting. With error correction in case the article has changed. Don't guess, read the

It enables paragraph based linking and paragraph (or sentence) based highlighting. With error correction in case the article has changed. Don't guess, read the release notes (http://open.blogs.nytimes.com/2011/01/11/emphasis-update-and-source/ http://open.blogs.nytimes.com/2011/01/11/emphasis-update-and... as noted many times in the comments here).