BetterPHP

I'm not sure if any other browsers use this, but in iOS 5, apple added a "reader" feature to mobile safari that shows just like the important text and images and stuff on the page.
I'm curious to know if anyone knows how it works. I'm like guessing that it's done by getting everything within the <section> tags on an HTML5 page. But since not everything is HTML5, that may not be it.

So… does anyone know what they do to get it?

It will be something like you suggested, or it might be just all of the text from the page with he formatting removed ? Or perhaps all of the text of a length greater than X inside a single tag ?