On my HTML5 website, my "aside" content often contains navigation links to engage the visitor to visit other pages. Such navigation links include the title of the page and sometimes a preview of the content. These links are ramdomly created and can change based upon the cache configuration.
How can I say search engines this content is not relevant for being referenced and that it shouldn't bother doing so? Is there an HTML attribute to specify that on an element?
For instance, I have a page called "Top Music 2011". If you search Google with the request : site:deadrooster.org "Top Music 2011"
you'll find many results but only 1 -the first, luckily- is really pertinent. Other pages are retured because once in their lifetime, they contained a link to the "Top Music 2011" page but at the time the user is going to click the link, he can't be sure it's still the case. And I want to fix that.