I'd really like the page to be a canvas, made up of many addressable sub objects such as documents. Doable with rdfa or microdata, where elements can declare ur

I'd really like the page to be a canvas, made up of many addressable sub objects such as documents. Doable with rdfa or microdata, where elements can declare urls for themselves, but there's nothing but semantic web researchers and some experimental browsers & extensions for it. The page itself could rock & extend this premise, if it wanted.