How can I prevent Google engines to reference links-and-previews sections of my website

Question

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.

Answer 1

You can't. To quote from the horse's mouth:

How to tell Google not to [index part of a page]?

You don't! If it is content, If it is part of that page, then it Will be Crawled, and may be Indexed and Ranked

You cannot use a Meta-Tag, or a HTML tag to tell Google to ignore, discount, not use, refer or touch part of your content.

You can use JavaScript or frames, though this will have other side-effects. This link will give you more information: http://www.google.com/support/forum/p/Webmasters/thread?tid=4790fe490de7a55e&hl=en.

Better to use semantic HTML and leave Google to do its thing.