Re:downwards compatible?, so is windows 3.x (Score 1)

Several features have been moved to the RSS 3 Full spec because they are useless to low scale aggregators. For example, the Firefox Livemarks don't need enclosures or images. However, enclosures, images and other dandy things are available in RSS 3 Full. The separation does not create two flavors, just two modes of implementation depending on use.