Does it make sense to have a rel=nofollow attribute in img tag?Do search engines' crawlers use this attribute in some way for calculating PageRank score?What is the practical sense for using it (if any)?
rel=nofollow in img tags?
seo;html;search engines;rel
The rel attribute is only for a and link elements. The nofollow value is to keep a web crawler from following that link (which might have affected the linked page's ranking based on your own). It keeps spammers commenting on blog posts from gaining any page ranking from linking from the blog (or discussion forum, etc.). It doesn't make sense for img elements and furthermore an img with a rel attribute is invalid, which may lower your relevancy score by a search engine. 